due to the junit changes in eclipse 3.6.0 version, which birt 2.6.0 is based
on:
http://wiki.eclipse.org/eclipse/testing/junit4_changes 

please update the related junit test plugins to use correct junit version range
in the manifest.mf.
if you still want to be able to run with junit3, use a range of "3.8.0". if
you only want to run on junit4, you can use a range of "4.7.0".
updated.
verified in daily build v20100513-1121