Well, I didn't do a memory test since I don't think a pre-beta demo acting weird warrants that as first course of action. What I DID do was disable the Zotero plug-in http://www.zotero.org/ which seemed to be the problem. Now it runs with FireFox in the background, just what I always wanted... I meant the Windows username. I don't think Doom3/TDM should suffer but DarkRadiant seems to have problems with that. If I temp create a user without strange symbols like å ä ö in the name it works, otherwise it complains about not being able to write to the log, wanting me to check the write priviliges of the Radiant directory. I've had this problem before with other apps, as I mentioned before, e.g. GIMP.