Error in 1.1 bootstrap with new artifact plugin

[Arnaud HERITIER]

Hi all,
 
We have a problem with the artifact plugin in the maven 1.1 bootstrap
http://rafb.net/paste/results/rI2Tns92.html
What is weird is that tests pass if we execute them in the plugin
This is an error with forehead : http://rafb.net/paste/results/y6WcmY32.html
 
Any idea ?
 
Arnaud