I really don't think there is any reason to keep that RegEx in there. I'll see if I can take it out so it will work. (there are some other issues discussed in the bug reports forum, that are being fixed now as well)
not just the word regex, but that whole function that includes the regex. It will require quite a bit of recoding. I'll try to get it done and have it included in v3.4.01
I got caught by that one with a mod I wrote, Regexp component is not supported in a default IIS4 installation on Windows NT (some ISPs are still running IIS4 on Windows NT), and a Windows 2000 Server IIS5 installation needs to be updated to support the latest RegExp functionality.