When I try building for archiving for my app in Xcode (version 4.5) I get an error that says:
ld: file is universal (3 slices) but does not contain a(n) armv
Yeah, I had this same exact problem. Click on your project in xcode. Then, click on the target. Go to build settings and look for valid architectures. Delete armv7s from the list of valid architectures and just leave armv7.
Let me know if you have any questions!