Server 2008 project!

[dexter.inside]

I've seen the same problem too, I'm guessing that the RWMs used by the WDS are still using the previous (6.0.6000) version of the wimgapi internally. Capturing manually with latest ImageX doesn't cause this problem, or at least not to the extent you're describing.

AFAIK, when Mr. Bangalore Guruprakash (brGuru) first implemented the WIM algorithms they were not designed to handle UNC paths so there's some ugly hack involved that does the dirty work of remapping something into something else digestible by the WDS data-in operation.

Try to do a capture manually to see what speeds.