When the SL viewer is running, and I toggle to another computer and then toggle back, the SL viewer freezes / is non-responsive. Also, any typing I do with other programs is affected, where characters are dropped and others are repeated. After about 2-3 minutes, SL viewer will occasionally un-freeze and resume as normal but in most cases I have to kill it and start the viewer again. UPDATE: Just toggled and SL viewer again froze. However, I can still hear regional audio from the viewer, so it makes me wonder if its just the visual aspect that is frozen.