Why is Textmate treating *.rb files as PlainText - ruby

Question

Been using Textmate 2 for ages. Usually keep it on the nightly builds. A couple of weeks ago it started sporadically treating all my *.rb files as plaintext. And as of the latest release build - it treats all my *.rb files as Plaintext. :(
I've tried:
Turning off all the syntax highlighters, restarting TM and reinstalling them
Uninstalling TM; reinstalling the App
Using only the actual releases, instead of nightly builds
After uninstalling all language packs, it correctly asks to install coffeescript, javascript, json, etc when I open those files. However, it does not ask for a *.rb file.
I've searched the TM mailing list and found nothing similar.
*.rake, *.rbx and all the other file types listed in the Ruby Language pack are recognized as ruby.
Any ideas?

Answer 1

When you open a file and manually change the file type via the status bar then TextMate 2 will remember this binding (for all files using same extension) in ~/Library/Application Support/TextMate/Global.tmProperties.
There are a few options to undo a stored file type binding:
Open a *.rb file and select Ruby via the status bar.
Edit ~/Library/Application Support/TextMate/Global.tmProperties to remove anything that sets fileType for *.rb. Such entry would look like:
[ *.rb ]
fileType = text.plain
Delete ~/Library/Application Support/TextMate/Global.tmProperties.

Answer 2

Quit TextMate
Remove /Library/Application Support/TextMate
Remove ~/Library/Application Support/TextMate
Launch TextMate
Open a *.rb file
Profit!