Transient Build failures on 2.2.x branch

[Christian Schneider]

I recently checked out the 2.2.x branch on Windows 7, JDK 1.6.0_20, 
Maven 2.2.1, emprty Maven repo. It took me about 10 calls of "mvn 
-Pfastinstall source:jar install" till the build succeeded. Everytime it 
failed with another dependency that it could not find. On the next call 
it found the dependency but failed on another.

Any idea what caused this?
Greetings

Christian