Here too. Shows up on most applications and completely freezes others (Dropbox, New Yorker). Looks like this was an issue in beta, too? Really hope there's a fix that doesn't involve a complete erase of all settings and data and then a reinstall. (I have an iPad 3, 64GB).
I finally connected the iPad t the computer, used iTunes to restore to factory settings, then restored from my last back-up, which, fortunately, I had done just before intalling iOS7. Seems to have worked but a real pain.