Hi guys, anyone is having this problem on iMac? its iMac mid 2011, 21"5 with OSX Lion10.7.2, 4GB RAM, 500GB HDD, bought on October 28th. Do you notice the is quality of the text and images is lower during swipe just before the page gets refreshed? Please compare the left and right, its an screenshot during a between pages swipe. Any help please?