What's wrong with the syntax-highlighting of the rails-bundle? (http://niko-dittmann.com/Downloads/textmate_rails_syntax.png)
Did my best to transcribe the line you provided and didn't find any error in the highlighting. Best to post the actual code though so it can be tested easily:
In the TextMate bundle there is a "Paste Selection Online" option, use it to paste a sample that breaks and send the url it provides to the list.