tmarble question on noir routing

noir-troubles.txt

~/src/noir-examples/my-website/src/my_website/views/welcome.clj
contains...

(defpage "/user/:id" {id :id}
   [:div
    (str "You are user number " id)
    ])

http://localhost:8080/user/123
results in...
java.lang.IllegalArgumentException: Key must be integer
	at clojure.lang.APersistentVector.invoke(APersistentVector.java:250)
	at compojure.response$fn__223.invoke(response.clj:26)
	at compojure.response$fn__200$G__195__207.invoke(response.clj:10)
	at my_website.views.welcome$eval59$fn__60.invoke(welcome.clj:63)
	at compojure.core$if_route$fn__302.invoke(core.clj:39)
	at compojure.core$if_method$fn__295.invoke(core.clj:24)
	at compojure.core$routing$fn__317.invoke(core.clj:98)
	at clojure.core$some.invoke(core.clj:2388)
	at compojure.core$routing.doInvoke(core.clj:98)
	at clojure.lang.RestFn.applyTo(RestFn.java:139)
	at clojure.core$apply.invoke(core.clj:602)
	at compojure.core$routes$fn__321.invoke(core.clj:103)
	at noir.server.handler$init_routes$fn__1460.invoke(handler.clj:50)
	at noir.request$wrap_request_map$fn__1398.invoke(request.clj:14)
	at ring.middleware.keyword_params$wrap_keyword_params$fn__447.invoke(keyword_params.clj:27)
	at ring.middleware.nested_params$wrap_nested_params$fn__484.invoke(nested_params.clj:65)
	at ring.middleware.params$wrap_params$fn__421.invoke(params.clj:76)
	at ring.middleware.multipart_params$wrap_multipart_params$fn__510.invoke(multipart_params.clj:103)
	at ring.middleware.flash$wrap_flash$fn__673.invoke(flash.clj:14)
	at ring.middleware.session$wrap_session$fn__666.invoke(session.clj:40)
	at ring.middleware.cookies$wrap_cookies$fn__603.invoke(cookies.clj:150)
	at noir.server.handler$wrap_base_url$fn__1451.invoke(handler.clj:33)
	at noir.session$noir_session$fn__1412.invoke(session.clj:58)
	at ring.middleware.session$wrap_session$fn__666.invoke(session.clj:40)
	at ring.middleware.cookies$wrap_cookies$fn__603.invoke(cookies.clj:150)
	at noir.cookies$noir_cookies$fn__1262.invoke(cookies.clj:66)
	at ring.middleware.cookies$wrap_cookies$fn__603.invoke(cookies.clj:150)
	at noir.validation$wrap_noir_validation$fn__1441.invoke(validation.clj:90)
	at noir.statuses$wrap_status_pages$fn__1361.invoke(statuses.clj:35)
	at ring.middleware.reload_modified$wrap_reload_modified$fn__811.invoke(reload_modified.clj:15)
	at noir.exception$wrap_exceptions$fn__1391.invoke(exception.clj:59)
	at noir.options$wrap_options$fn__1352.invoke(options.clj:34)
	at ring.adapter.jetty$proxy_handler$fn__743.invoke(jetty.clj:16)
	at ring.adapter.jetty.proxy$org.mortbay.jetty.handler.AbstractHandler$0.handle(Unknown Source)
	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
	at org.mortbay.jetty.Server.handle(Server.java:326)
	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:926)
	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
	at org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228)
	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)