Yea i'm in the same boat too, unable to run fix permissions.. also I can install a pkg game, but can't run it - so presume its due to the fix permissions.. Some said to install Geohots over the top, but I'm a bit wary of that lol.
other than that, everything else works flawlessly - just don't fancy losing everything else
me too i can get fix permissions and multiman to run... but i get error with awesome file manager, blackbox, doom 3....but then some other pkgs work ps3 fsn emulator, multiman, and fix permissions... i don't understand the error i get is 80029519.
80029519 ERROR, i just sussed, i was still using the old versions, download the signed versions, im all up and running now, just happen to have 2 games that blackscreen, just incompatable ones at present.