Hi Matt,

When I drag an image, whether it be from the filesystem or the project drawer, I get strange output where the alt tag should start.

<img src="building.jpg" border="0" width="200" height="438" tr: range-endpoints of

Just for the record it's working fine here (10.5.2, latest TextMate (1464)) , which suggests to me that you might be bumping into a non-standard "tr" utility. That's certainly the point at which the command looks to be breaking. The string that you're seeing inserted in place of the "alt" looks like it comes from a linuxy tr, rather than the built-in /usr/bin/tr : what do you get when you enter

  which tr

and then hit control-r  within TextMate? If it's something other than /usr/bin/tr you can either adapt your PATH (see the TM manual) or explicitly point at the built-in version of tr (or move the impostor out of the way). Anyway, it's just speculation, but hopefully it sets you on the right track...

Cheers,
Paul