I am using version 1.5.15 (1523) of Textmate on OX X Snow Leopard. My .rb files only have rudimentary highlighting, and the highlighting breaks on every appearance of a double-quoted string. The syntax has been checked and it is valid.
How can I fix the code highlighting for .rb files. It's almost as if it doesn't know it's a Ruby file.
When you have an .rb file open, make sure that the syntax/filetype is set to Ruby. In the "status bar" at the bottom of the window, to the right of the Line/Column numbers, you can click the file type and choose "Ruby" (it's probably set to something else).
After doing this, TextMate should remember that .rb files should use the Ruby type going forward.
