Hi Allan,

Thanks for the tips.  I suspect $TM_PATH may be the culprit.

  1) do you have /usr/bin/ruby? Does /usr/bin/ruby -e 'p :test' work?

Yes and yes.

  2) what does: echo $TM_RUBY (and pressing ⌃R) give in TM?

/usr/bin/ruby 

  3) what does: echo $TM_PATH (and pressing ⌃R) give in TM?

Nothing, and "Show TM_* Variables" in the TextMate bundle doesn't show it either.  Odd.  What's a good value for it?

  4) what does: which ruby    (and pressing ⌃R) give in TM?

Something weird, perhaps related to the missing $TM_PATH:
]2; /Users/cassio/Desktop]1; cassio/Desktop/usr/bin/ruby

 Thanks again,
Cassio