Thanks to everyone who's written in with their error reports; we've discovered that one of the web server classes NavBot uses is only supported on Windows XP SP2, Windows Server 2003 and, presumably, Vista. Sorry about that, everyone! If you can, then upgrade to SP2. If not, then I'll take a look and see if I can replace the class, but I'd rather not write my own web server from scratch ;-)
There are a couple of other error reports coming in, of wildly innacurate profit predictions (including cases where no profit should be possible) and of crashes when trying to view market reports or search for trade routes. I suspect the former *may* be related to localisation; I'm working on a German-localized laptop (ja, ich wohne hier in Deutschland) with the English-language EVE download and an English-language Visual Studio (ja, so gut ist mein Deutch noch nicht!).
I can easily imagine some combinations might be getting their "," and "." confused. I'll try to reproduce this tonight, and hopefully send out a revision C with fixes for this tomorrow or the day after.
Have a nice day,
OpenCloud