Hello all. I have a 2009 Nvidia 20" iMac, and the screen sits crooked on the stand. The right side of the screen is about 3mm higher than the left side of the screen. I've even used a water level to check. At first I thought it was just an optical illusion, but it really is crooked. There appears to be no warping on the iMac's foot, or screen housing. Anybody else with this weird issue? Would you send your iMac back if it had this issue? Thanks in advance.