I have been testing rev 45368, a trunk build from yesterday and I am finding that I am getting alot more instances of lock-ups, compared with earlier revisions. Alot of these lock-ups seem to be associated with the mouse. If the mouse is moved when a window or menu is opening, then a lock-up may occur. This does not happen every time.
Firefox 2 only loads pages when the mouse is moved.
Something else that I have noticed (going back to 0.3.11 and maybe to 0.3.10) is that icons associated with one programme are displayed in the button of another programme on the taskbar of the desktop.