Thread:Project:Support desk/Thumbnail handler (rewrite) doesn't work

My .htaccess:

index.php rewrite rule works, but thumbnail doesn't.

If get thumb.php directly, it works: So, the problem is in rewriting...

there is a web server error when I trying to get http://mysite.com/w/images/thumb/4/45/Chrysanthemum.jpg/180px-Chrysanthemum.jpg: Why the string is cutted?