The search is your friend.No idea why, but search the word redraw on this site. There are a couple of threads that have a fix for this.
I might have to do some reading on the redraw threads because a couple of days after bragging about fixing it here the problem is coming back.
(not always and not as bad though)
After troubleshooting a bit verizon rep popped in a brand new SD card and the problem went away