I was able to upgrade my phone to IOs 5 through the restore feature and everything completed normally. I went through the new IOs 5 setup on my iphone4 and I chose the option to restore from a back up, however when I plug the iphone into itunes and attempt to restore from my last backup, I receive an error stating that my back up is incompatible or corrupt. Has anybody else experienced this and if so, is there a way to restore your data after the upgrade?