It still has bugs, even on the PS3 GOTY edition.
The biggest problem with PS3 Fallout (and Fallout New Vegas) is that you have no access to the console (pressing the backquote "`" key) to correct any game breaking bugs that occur. The only recourse is to go back to an earlier save game.
You also do not have access to mods or cheats, which may be important to you.
My seat of the pants impression, having played both the PS3 and PC versions is that the PC version is more buggy, possibly because of my PC configuration, but any quest bugs are correctible via console commands. Furthermore after completion I can play with the console to spawn items and adjust statistics for fun and to try out different things.