Had no problems with PB 15" screen until update to 10.4.3
Heh....I'm a little disconcerted because my screen was just gorgeous, no problems, no lines, no flickers....and then I just now updated the OS to 10.4.3 and right away the screen starts flickering to beat the band. I finally resorted to turning off the ambient light thingy and now it seems to be stablized again, but that took me by surprise. Maybe the new software version rendered it more sensitive to ambient lighting conditions?
OTB
Edited on 11/27/05 to add that I have experienced no more problems with flickering. That was (thankfully) apparently a one-off and now I'm using the ambient light thingy again and the machine is working beautifully.