Issue: in user preferences window, using file selecting caused the the userpref window to be saved, and not closing. Reason: design error (by me) in using screen->full tag for denoting a temporarily screen (like file window). Fixed by using a new screen->temp variable for it. System remained unstable though, noticed another issue with freeing temp screens in wrong places. Seems nice stable now! Will check on the wiki for relarted issues now.