As far as Arkham City I dumped the original disc US on Kmeaw well before TB came out. Then switched to TB CFW and had no problems. So you may be able to use Kmeaw as well instead of Rebug. Another supposed fix I read that worked for some people was to use fix permissions in multiman w/o redumping and changing firmware. I can't test this myself as I dont have the trophy problem.
Originally Posted by BahumatLord
PS3 Slim 4.21.2 Rebug REX 4.31 Spoof (external 1TB/3TB), PS2 Fat w/ Internal HD