RDesktop 1.5.0 occasionally seems to lock up when connected to Vista (RTM/Final). It usually occurs when a large video update is performed, and often it seems to freeze half way drawing a new complicated window. The cursor still moves, however no input is passed to Vista, and nothing is updated on the rdesktop side. I can generally recreate within 15-30 minutes of using RDesktop and Vista, and a restart of RDesktop is the current workaround. Vista is running with all visual options off in favour of performance.