thats because no one have any interest in 10.3 amd only dev on 2 versions in the future (10-5 beta 10-6 alpfa is right now in dev)and only the bugreports in the betadriver team can do relevant bugreports for this versions!
a bugreport for 10.3 do have zero sense for the future drivers thats because 10-4 is allready stable in ubuntu 10.04 and the catalyst 10-5 is allready finish right now there will be no chances in 10-5 until release!
the only chances goes into the 10-6 catalyst right now.
in short words: bugreports on old catalyst versions do not make any sense ! only the newest version 10-4 have a little sense but not realy because the beta driver team test 10-6 and 10-5 is allready finished..
install ubuntu 10.04 install catalyst 10-4 and bugreport for the right version again!