I have changed my GFX card on my G5 2.7 GHz from a Radeon 9600 XT 128 MB to a Radeon 9600 Pro 256 MB (my old one seems to have broken down). Since I've changed it I've noticed some more grapchical glitches than the old card: like random lines flickering (happened with the last card too, but not as much) and that sometimes when I start a game (like Ace of Hearts) my mouse pointer turns yellow with a long, white stripe besides it. And for some reason, some games doesn't work because of the signal not being "within range", which is strange since the screen should be able to handle all normal solutions. I have noticed this on Return to Castle Wolfenstein, Freespace and the intro movie to Robin Hood. But other low solution games works, including the actual game of Robin Hood.

Is this only me or have someone else noticed these or similar problems?