I reinstalled my Mac recently. Because it was a new installation a had to install everything from scratch which includes a TextMate. After a while of using it I get annoyed by dialog window for opening a file. It list lots of similar files from vendor folder in my Rails env. So I investigate little bit and find that you can modified settings for that (Preferences -> Advanced -> Folder references -> Folder pattern). When I’m trying to open a file, TextMate is ignoring vendor folder, now. You can see regexp for that bellow.