[TxMt] Huge delay in TextMate 1.1b12

I write a LOT of LaTeX documents, and as I was working on the class for one of them, I've noticed that when trying to fix up some braces ({}), TextMate will slam the CPU on my iMac G5 to 100% for 15-20 seconds, before continuing. Here's a little snip from what I was trying to fix:

\newcommand{\tla}[1]{{\scshape {\MakeLowercase{#1}}}}

Not very complex, but when I added the last closing brace, it went wonky. I had thought in the past that it wouldn't come out, so I'd kill it, but this time, I just let it run, and eventually it fixed itself.

I tried switching to plain text, and that helped, so it seems to be something in the way the language pack is written. Any thoughts?

Chris