Contacts icon blank in Twitter settings on iPad with iOS 5

If you are using twitter on iOS 5 with an iPad and go to settings ---> twitter.....there is a list of apps that have been approved to access your twitter account. These could include Safari, Photos, Maps, YouTube, and Contacts. Each has an icon of the app along with an on/off toggle switch. For some reason the Contacts app icon is the only one that's blank. On my iPhone 4 with iOS 5 it shows correctly. My wife's iPad has the blank icon as well. Anyone else? I know it's not a huge deal, just an OCD thing with me. I've tried restoring but nothing seems to fix it. Hopefully it's not just me and my wife anyways.