Content Deployment Debugging Links
There is more info on Content Deployment issues in earlier blog entries here.
The main thing is to first install SP1 and KBs 941422, 948945 and 950279, and 952698 and 952704 (these last two may rollup all the changes in the earlier KBs, I am trying to confirm that).
Beyond that, the best information on debugging Content Deployment jobs can be found on Maxime Bombardier's blog:
https://blogs.msdn.com/maximeb/archive/2008/02/19/debugging-content-deployment-issues.aspx
(setting versioning to only Major Versions in the Style Library helped me out big time)
and in parts 5 and 6 of Stefan Goßner's series on content deployment:
Also note that there are quite a few fixes included in SP1 plus the post SP1 rollups KBs 941422 and 948945 and 950279.
https://support.microsoft.com/kb/941274
https://support.microsoft.com/kb/948945
https://support.microsoft.com/kb/950279
There are two KBs that are specific to Content Deployment with 60+ fixes. If you have having serious CD problems, you'll need to talk with Customer Support Services to obtain these:
https://support.microsoft.com/kb/952698
https://support.microsoft.com/kb/952704/
In theory these two are a rollup of all the previous Content Deployment hogfixes. I am still trying to confirm that this is true.