Local copy of the file works, fetching directly over remote fails. Something wrong with standard library?

RDF.rb encoding error when fetching remote files

root@ip-10-251-122-82:/home/lavender/spocq/src/test/rspec/tests/data-r2/i18n# curl http://tmp.datagraph.org.s3.amazonaws.com/import/33f361f0-d1b2-012d-f3cf-0023df827da6 > curl
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
113   795  113   795    0     0  47522      0 --:--:-- --:--:-- --:--:-- 56785
root@ip-10-251-122-82:/home/lavender/spocq/src/test/rspec/tests/data-r2/i18n# diff curl normalization-01.ttl 
root@ip-10-251-122-82:/home/lavender/spocq/src/test/rspec/tests/data-r2/i18n# ls -al curl normalization-01.ttl 
-rw-r--r-- 1 root     root     795 2010-11-14 00:21 curl
-rw-r--r-- 1 lavender lavender 795 2010-10-29 05:46 normalization-01.ttl

root@ip-10-251-122-82:/home/lavender/spocq/src/test/rspec/tests/data-r2/i18n# irb1.9
irb(main):001:0> require 'rdf/n3'
=> true
irb(main):002:0> RDF::Repository.load('./normalization-01.ttl', :format => :n3)
=> #<RDF::Repository:0x46b749e()>
irb(main):003:0> RDF::Repository.load('http://tmp.datagraph.org.s3.amazonaws.com/import/33f361f0-d1b2-012d-f3cf-0023df827da6', :format => :n3)
Encoding::CompatibilityError: incompatible character encodings: ASCII-8BIT and UTF-8
	from /var/lib/gems/1.9.1/gems/treetop-1.4.8/lib/treetop/runtime/compiled_parser.rb:97:in `index'
	from /var/lib/gems/1.9.1/gems/treetop-1.4.8/lib/treetop/runtime/compiled_parser.rb:97:in `has_terminal?'
	from (eval):85:in `_nt_barename_start'
	from (eval):46:in `_nt_barename'
	from (eval):1504:in `_nt_nprefix'
	from (eval):744:in `_nt_declaration'
	from (eval):2609:in `_nt_statement'
	from (eval):2666:in `block in _nt_statements'
	from (eval):2659:in `loop'
	from (eval):2659:in `_nt_statements'
	from (eval):20:in `_nt_document'
	from /var/lib/gems/1.9.1/gems/treetop-1.4.8/lib/treetop/runtime/compiled_parser.rb:18:in `parse'
	from /var/lib/gems/1.9.1/gems/rdf-n3-0.2.3.2/lib/rdf/n3/reader.rb:76:in `each_statement'
	from /var/lib/gems/1.9.1/gems/rdf-0.2.4.pre2/lib/rdf/mixin/writable.rb:124:in `insert_statements'
	from /var/lib/gems/1.9.1/gems/rdf-0.2.4.pre2/lib/rdf/mixin/mutable.rb:50:in `block in load'
	from /var/lib/gems/1.9.1/gems/rdf-n3-0.2.3.2/lib/rdf/n3/reader.rb:56:in `call'
... 5 levels...
	from /var/lib/gems/1.9.1/gems/rdf-0.2.4.pre2/lib/rdf/reader.rb:114:in `block in open'
	from /usr/lib/ruby/1.9.1/open-uri.rb:150:in `open_uri'
	from /usr/lib/ruby/1.9.1/open-uri.rb:669:in `open'
	from /usr/lib/ruby/1.9.1/open-uri.rb:33:in `open'
	from /var/lib/gems/1.9.1/gems/rdf-0.2.4.pre2/lib/rdf/util/file.rb:28:in `open_file'
	from /var/lib/gems/1.9.1/gems/rdf-0.2.4.pre2/lib/rdf/reader.rb:109:in `open'
	from /var/lib/gems/1.9.1/gems/rdf-0.2.4.pre2/lib/rdf/mixin/mutable.rb:40:in `load'
	from /var/lib/gems/1.9.1/gems/rdf-0.2.4.pre2/lib/rdf/repository.rb:78:in `block (2 levels) in load'
	from /var/lib/gems/1.9.1/gems/rdf-0.2.4.pre2/lib/rdf/repository.rb:77:in `each'
	from /var/lib/gems/1.9.1/gems/rdf-0.2.4.pre2/lib/rdf/repository.rb:77:in `block in load'
	from /var/lib/gems/1.9.1/gems/rdf-0.2.4.pre2/lib/rdf/repository.rb:108:in `call'
	from /var/lib/gems/1.9.1/gems/rdf-0.2.4.pre2/lib/rdf/repository.rb:108:in `initialize'
	from /var/lib/gems/1.9.1/gems/rdf-0.2.4.pre2/lib/rdf/repository.rb:76:in `new'
	from /var/lib/gems/1.9.1/gems/rdf-0.2.4.pre2/lib/rdf/repository.rb:76:in `load'
	from (irb):3
	from /usrirb(main):005:0* 
RDF::Repository.load('curl', :format => :n3)
=> #<RDF::Repository:0x459541c()>