and the redirect is still broken for me
www.wdnaddons.com is still broken (edit: in my dnscache that is), wdn.wowinterface.com (which you use in WAU) works just fine now though - both from my home and my remote server.
I agree it might be coincidence and I thought it could just have been an ad removed from the rotation - but I am 100% sure I had a crash with the wowdb ad before and don't anymore.
Maybe I'm lucky, but if more people report it fixed I would look into that code again. (Maybe it's a win32 issue with weird server responses or something, doesn't have to be your code per se.) I personally would find it suspicious that the crash syncs up so nicely with the failing wdn call.
Either way, you could also go the good old employed programmer route and be happy that the crash is fixed now and don't look further into the why question ;)