I am having major issues with Lion on my late '08 MBP (1st unibody model, 2.4 ghz, 2gb). Performance is very sluggish system-wide, apps are slow to respond and lock up often. Safari and iTunes in particular are bad with constant stuttering (audio and video), but the problem exists across the board. Even typing seems to jam it up. Is this a known issue or am I an idiot? I do typically run multiple apps of varying system resource usage at a time, but even with only 1 or 2 open it's a poor performer. Anyone else have this problem? Was planning to upgrade my ram and see what that does for me, apple says the machine supports only 4gb, but anyone know if it can take more? Help!