Hi there. So last night, after reading this entire thread, I decided to give Rebug 4.21.1 a try. I had been using Rogero 3.55 v3.4 for several months and it's been great, but I just had to try this new CFW. I simply installed the toggle_qa.pkg, ran it (of course) and then installed Rebug 4.21.1 from XMB.
Everything went well. Against my better judgement, I signed in to PSN, synced my trophies and activated my PS3 for game content. Now Sony has all the info they need to smack me over the head with the ban hammer, so if any of you hear a loud and agonizing scream, you'll know who it was. :-P
I have not done a lot testing yet, but so far Journey and WipeOut HD/Fury still work from XMB. Dead Or Alive 5 however, freezes after a few minutes of gameplay. Has anyone gotten this game to work?