[TxMt] erb Load Error?

I got the following error today when I tried to run a TextMate command in the GTD2 bundle:

/tmp/temp_textmate.P3vuHw:4:in `require': No such file to load -- erb (LoadError) from /tmp/temp_textmate.P3vuHw:4

I've been playing around with my ruby installation, but it seems to be running fine (1.8.6). I can run a script with "require 'erb'" from within TextMate, so I don't think that ruby is the problem. I also checked to make sure that I haven't changed the code for the command, but it checks out as the most current in svn.

Any idea what's going on? Thanks.

Mike