app_main.coffee.js

var Artifacts, exports, getDataFromForm;

exports = this;

Artifacts = new Meteor.Collection("artifacts");

exports.Artifacts = Artifacts;

/* Global convenience functions
*/


getDataFromForm = function(formID) {
  var retobj;
  retobj = {};
  $("" + formID + " > *").each(function() {
    var field;
    field = $(this);
    if (!!field.val() && field.val() !== "Filter by Type") {
      return retobj[field.attr('id')] = field.val();
    }
  });
  return retobj;
};

/* Set up page forwarding
*/


if (Meteor.isClient) {
  Meteor.pages({
    "/": {
      to: "home",
      nav: "Home"
    },
    "/home": {
      to: "home",
      nav: "Home"
    },
    "/add_artifact": {
      to: "add_artifact",
      nav: "Add Artifact"
    },
    "/artifact_search": {
      to: "artifact_search",
      nav: "Artifact Search"
    },
    "/view_action": {
      to: "view_action",
      nav: "Action Log"
    },
    "/view_teams": {
      to: "view_teams",
      nav: "View Teams"
    }
  }, {
    defaults: {
      layout: "layout"
    }
  });
  /* Set up some defauilts
  */

  Meteor.startup(function() {
    Session.set("current_page", 'home');
    return Session.set("filter_criteria", "");
  });
  /* These functions are needed to render the templates correctly.
  */

  Template.home.rendermap = function() {
    return Meteor.defer(function() {
      return loadmap();
    });
  };
  Template.layout.runlayoutscripts = function() {
    $(document).foundation();
  };
  /* These are global helpers for all of the pages.
  */

  Handlebars.registerHelper("iscurrentpage", function(page) {
    return page === Session.get("current_page");
  });
  Handlebars.registerHelper("getcurrentpage", function(page) {
    return Session.get("current_page");
  });
  /* Code for the add artifacts page.
  */

  Template.add_artifact.events({
    "click button#add": function() {
      Artifacts.insert({
        Northing: $("#Northing").val(),
        Easting: $("#Easting").val(),
        Datum: $("#Datum").val(),
        Notes: $("#Notes").val(),
        Username: $("#Username").val(),
        ArtifactNumber: $("#ArtifactNumber").val(),
        ArtifactType: $("#ArtifactType").val(),
        Depth: $("#Depth").val()
      });
      return $('<p>Data added!</p>').insertAfter('#add');
    }
    /* Searching artifacts.
    */

  });
  Template.artifact_search.artifacts = function() {
    var criteria;
    criteria = Session.get('filter_criteria');
    return Artifacts.find({
      Depth: criteria
    });
  };
  Template.artifact_search.events({
    "click button#search": function() {
      Session.set('filter_criteria', "3");
    }
  });
  Template.artifact_search.has_search_preset = function() {
    if (Session.get('search_preset')) {
      return true;
    }
  };
  Template.artifact_search.get_search_preset = function(NorE) {
    var preset;
    preset = Session.get('search_preset');
    if (NorE === 'northing') {
      return preset['northing'];
    } else {
      return preset['easting'];
    }
  };
  /* Code for view teams page
  */

  Template.view_teams.makeflickable = function() {
    return Meteor.defer(function() {
      Flickable('.flickable', {
        enableMouseEvents: true
      });
    });
  };
}

Error

This is the code I have, but this is the error I get back after clicking the 'search' button:

Exception from Deps recompute: Error: Error copying attribute '"': Error: InvalidCharacterError: DOM Exception 5
    at Function.Spark._Patcher._copyAttributes (http://localhost:3000/packages/spark/patch.js?299cb25985c501315fbd758353d7f498697a39c3:494:19)
    at Spark._Patcher.match (http://localhost:3000/packages/spark/patch.js?299cb25985c501315fbd758353d7f498697a39c3:249:26)
    at http://localhost:3000/packages/spark/patch.js?299cb25985c501315fbd758353d7f498697a39c3:61:23
    at visitNodes (http://localhost:3000/packages/spark/patch.js?299cb25985c501315fbd758353d7f498697a39c3:17:11)
    at visitNodes (http://localhost:3000/packages/spark/patch.js?299cb25985c501315fbd758353d7f498697a39c3:18:9)
    at visitNodes (http://localhost:3000/packages/spark/patch.js?299cb25985c501315fbd758353d7f498697a39c3:18:9)
    at visitNodes (http://localhost:3000/packages/spark/patch.js?299cb25985c501315fbd758353d7f498697a39c3:18:9)
    at visitNodes (http://localhost:3000/packages/spark/patch.js?299cb25985c501315fbd758353d7f498697a39c3:18:9)
    at Object.Spark._patch (http://localhost:3000/packages/spark/patch.js?299cb25985c501315fbd758353d7f498697a39c3:31:3)
    at http://localhost:3000/packages/spark/spark.js?45c746f38023ceb80745f4b4280457e15f058bbc:638:13 logging.js:40

main.coffee

# Set up a database that can be accessed from the client,
# or from the server and put it in the global namespace ###
exports = this
Artifacts = new Meteor.Collection("artifacts")
exports.Artifacts = Artifacts

### Global convenience functions ###
getDataFromForm = (formID)->
  retobj = {}
  $("#{formID} > *").each ->
    field = $(@)
    if !!field.val() and field.val() isnt "Filter by Type"
        retobj[field.attr('id')] = field.val()
  return retobj
######

### Set up page forwarding ###
if Meteor.isClient
  Meteor.pages
    # Page values can be an object of options, a function or a template name string
    "/":
      to: "home"
      nav: "Home"

    "/home":
      to: "home"
      nav: "Home"

    "/add_artifact":
      to: "add_artifact"
      nav: "Add Artifact"

    "/artifact_search":
      to: "artifact_search"
      nav: "Artifact Search"

    "/view_action":
      to: "view_action"
      nav: "Action Log"

    "/view_teams":
      to: "view_teams"
      nav: "View Teams"
  ,
    # optional options to pass to the PageRouter
    defaults:
      layout: "layout"

  ### Set up some defauilts ###
  Meteor.startup ->
    Session.set "current_page", 'home'
    Session.set "filter_criteria", ""
  ######

  ### These functions are needed to render the templates correctly. ###
  Template.home.rendermap = ->
    Meteor.defer -> #This line is VERY important!
      loadmap()

  Template.layout.runlayoutscripts = ->
    $(document).foundation()
    return
  ######

  ### These are global helpers for all of the pages. ###
  Handlebars.registerHelper "iscurrentpage", (page) ->
    return page is Session.get "current_page"

  Handlebars.registerHelper "getcurrentpage", (page) ->
    return Session.get "current_page"
  ######

  ### Code for the add artifacts page. ###
  Template.add_artifact.events "click button#add": ->
    Artifacts.insert (
      Northing: $("#Northing").val()
      Easting: $("#Easting").val()
      Datum : $("#Datum").val()
      Notes: $("#Notes").val()
      Username: $("#Username").val()
      ArtifactNumber: $("#ArtifactNumber").val()
      ArtifactType: $("#ArtifactType").val()
      Depth: $("#Depth").val()
    )
    $('<p>Data added!</p>').insertAfter('#add')
  ######

  ### Searching artifacts. ###
  Template.artifact_search.artifacts = ->
    criteria = Session.get 'filter_criteria'
    
    Artifacts.find({Depth: criteria})

  Template.artifact_search.events "click button#search" : ->
    #formdata=getDataFromForm("#searchform")
    Session.set 'filter_criteria', "3"
    return

  Template.artifact_search.has_search_preset = ->
    if Session.get('search_preset')
      return true

  Template.artifact_search.get_search_preset = (NorE) ->
    preset = Session.get('search_preset')
    if NorE is 'northing'
      return preset['northing']
    else
      return preset['easting']
  ######

  ### Code for view teams page ###
  Template.view_teams.makeflickable = ->
    Meteor.defer ->
      Flickable('.flickable', enableMouseEvents: true)
      return
  ###

static_cacheable_main.coffee.js

(function(){ var Artifacts, exports, getDataFromForm;

exports = this;

Artifacts = new Meteor.Collection("artifacts");

exports.Artifacts = Artifacts;

/* Global convenience functions
*/


getDataFromForm = function(formID) {
  var retobj;
  retobj = {};
  $("" + formID + " > *").each(function() {
    var field;
    field = $(this);
    if (!!field.val() && field.val() !== "Filter by Type") {
      return retobj[field.attr('id')] = field.val();
    }
  });
  return retobj;
};

/* Set up page forwarding
*/


if (Meteor.isClient) {
  Meteor.pages({
    "/": {
      to: "home",
      nav: "Home"
    },
    "/home": {
      to: "home",
      nav: "Home"
    },
    "/add_artifact": {
      to: "add_artifact",
      nav: "Add Artifact"
    },
    "/artifact_search": {
      to: "artifact_search",
      nav: "Artifact Search"
    },
    "/view_action": {
      to: "view_action",
      nav: "Action Log"
    },
    "/view_teams": {
      to: "view_teams",
      nav: "View Teams"
    }
  }, {
    defaults: {
      layout: "layout"
    }
  });
  /* Set up some defauilts
  */

  Meteor.startup(function() {
    Session.set("current_page", 'home');
    return Session.set("filter_criteria", "");
  });
  /* These functions are needed to render the templates correctly.
  */

  Template.home.rendermap = function() {
    return Meteor.defer(function() {
      return loadmap();
    });
  };
  Template.layout.runlayoutscripts = function() {
    $(document).foundation();
  };
  /* These are global helpers for all of the pages.
  */

  Handlebars.registerHelper("iscurrentpage", function(page) {
    return page === Session.get("current_page");
  });
  Handlebars.registerHelper("getcurrentpage", function(page) {
    return Session.get("current_page");
  });
  /* Code for the add artifacts page.
  */

  Template.add_artifact.events({
    "click button#add": function() {
      Artifacts.insert({
        Northing: $("#Northing").val(),
        Easting: $("#Easting").val(),
        Datum: $("#Datum").val(),
        Notes: $("#Notes").val(),
        Username: $("#Username").val(),
        ArtifactNumber: $("#ArtifactNumber").val(),
        ArtifactType: $("#ArtifactType").val(),
        Depth: $("#Depth").val()
      });
      return $('<p>Data added!</p>').insertAfter('#add');
    }
    /* Searching artifacts.
    */

  });
  Template.artifact_search.artifacts = function() {
    var criteria;
    criteria = Session.get('filter_criteria');
    return Artifacts.find({
      Depth: criteria
    });
  };
  Template.artifact_search.events({
    "click button#search": function() {
      Session.set('filter_criteria', "3");
    }
  });
  Template.artifact_search.has_search_preset = function() {
    if (Session.get('search_preset')) {
      return true;
    }
  };
  Template.artifact_search.get_search_preset = function(NorE) {
    var preset;
    preset = Session.get('search_preset');
    if (NorE === 'northing') {
      return preset['northing'];
    } else {
      return preset['easting'];
    }
  };
  /* Code for view teams page
  */

  Template.view_teams.makeflickable = function() {
    return Meteor.defer(function() {
      Flickable('.flickable', {
        enableMouseEvents: true
      });
    });
  };
}

})();

Template.html

<template name="artifact_search">
	{{> breadcrumb}}
	<div class="row">
		<div id="left">
			<div class="large-6 columns">
				<form id="searchform">
				<select id="ArtifactType" class="medium">
					<option>Filter by Type</option>
					<option>Pottery</option>
					<option>Bones</option>
					<option>Seeds</option>
					<option>Arrow Heads</option>
				</select>
				<br><br>
				<span>Search by Keyword</span>
				<input id="Keyword" type="text" placeholder="Search by Keyword">
				<span>Search by Northing</span>
				<input id="Northing" {{#if has_search_preset}}value="{{get_search_preset 'northing'}}{{/if}}" type="text" placeholder="Search by Northing">
				<span>Search by Easting</span>
				<input id="Easting" {{#if has_search_preset}}value="{{get_search_preset 'easting'}}{{/if}}" type="text" placeholder="Search by Easting">
				<span>Search by Depth</span>
				<input id="Depth" type="text" placeholder="Filter by Depth">
				<span>Search by Researcher</span>
				<input id="Researcher" type="text" placeholder="Filter by Researcher">
				</form>
				<button class="small button" onClick="parent.location=('home')">Home</button>
				<button class="small button" id="search">Search</button>
			</div>
		</div>
	
		<div id="right">
			<div class="large-6 columns">
				<DL id="artifactslist">
					{{#each artifacts}}
						{{> artifact}}
					{{/each}}
				</DL>
			</div>
		</div>
	</div>


</template>

<template name="artifact">
	<DT><STRONG>{{Notes}}</STRONG></DT>
	<DD>FS# {{ArtifactNumber}} Found by {{Username}} at a depth of {{Depth}}</DD>
</template>

Did you ever find out why this was? I'm getting the same error and have no clue.

@mkarliner Sorry! I guess I don't have notifications turned on, I just found this comment.

If I remember correctly, it ended up being just badly formatted HTML.
I had a quotation mark in the wrong spot, which rendered one of the tags ineffective. So, a general cleanup of the HTML solved the issue.