The same feature is working with subeclipse plugin in Eclipse-indigo and Fedora15.
For This I done the following
From Eclipse ,Right clicked the imported svn project
Select Team --> Set Property
Name : bugtraq:message
Value : %BUGID%
and save this property
Select Team --> Set Property
Name : bugtraq:label
Value: PMT/BUG#
and save this property also
select Team--> Show Properties
And found the above added properties are listed
Then try to commit a file It shows the space to enter PMT/BUG along with message.
But the same thing I tried with Rabbitvcs it is not working.
Can anybody help me to work the feature to enter PMT/BUG# along with commit details in RabbitVcs.