Calling regex geeks!

I need to tell Apache on newmoon to redirect all web hits over to lodestone--except that I want to allow any hits to newmoon that invoke the Mailman web UI to come on through.

I already have a RedirectMatch line that redirects anything of the form murkworks.net/~username. But I want to redirect anything in the Document Root, and NOT direct anything of the form murkworks.net/mailman/whatever.

Does anyone have any brilliant suggestions as to a regular expression I can feed the Apache config file to make it redirect anything that ISN'T murkworks.net/mailman/whatever? I tried a negative lookahead assertion, but when I try to restart apache, it bitches about not being able to compile the expression.

Another question for the geekily inclined

Okay, so here's the sitch...

Usually, I answer comments in LJ via email, because it's easy. I like to just be able to fill out the form at the bottom of the comment email, hit the button, and boom. However, prior to installing XP SP2, I was accustomed to seeing a browser window pop open with an LJ page that told me whether my comment was posted successfully. Now, I get nothing.

Does anyone know if this is an artifact of the new Popup Blocker stuff that SP2 has? Or perhaps something involved with the new Firewall? These are my two best guesses, and if either of them are accurate, I don't know what to do to fix this so that I do continue to get the messages when the comments go up correctly. I like getting that feedback.