I fell into the hype and purchased the 2 maps from download content onto one of my xboxes. When i try to transfer the TDATA over to my other xbox, it transfers over into the one without the maps. But when i try to load the new maps from the xbox that didnt download them originally, it shows two maps with X's and "Corrupted map". Any ideas or patches to fix this?

It's got to do with XBOX Live checksums.

http://forums.xbox-scene.com/index.php?showtopic=256167