See screenshot (zoom in to view better) The black line around the selected tab and at the bottom of the tabs is interrupted by the light grey tab border. This looks bad.
I noticed this myself and I have no idea how to stop that. These are border CSS colors and I don't know how to tell it to make that overlap pixel one color over another.
This bug was previously known as http://jira.rhq-project.org/browse/RHQ-1676 Imported an attachment (id=368607)
mass add of key word FutureFeature to help track
Closing per 19-Aug triage -- this bug will be made obsolete per UI redesign.