I just compared the 1.5.2 and 1.6.0 manifests and the main difference between the two seemed to be the addition of:
Bundle-License: Apache 2.0
to the 1.6.0 manifest, so you might try removing just that from the 1.6.0 manifest to isolate the problem.
Other than that, there was an issue (at least on dm Server 1.0.2) with newline characters. See http://forum.springsource.org/archiv...p/t-68442.html. So you might want to compare the manifests using a hex editor.
If you want to get to the bottom of this, one approach would be to do a binary chop and replace pieces of the 1.6.0 manifest that fails with the corresponding lines from your 1.6.0 manifest that works until the problem goes away. That should at least let you isolate the line causing the problem.