I have a 89gb ps3 have had gta on almost constantly (have not been online though), and have had no freezing, and so far Have not noticed any bugs/glitches. No issues so far, but I have herd of this freezing on the 60gb ps3 and on the 360's.
(and above constantly as in since the game got released I have had it running in ps3).
My game hasn't frozen at all yet except I got one glitch where in my game I had to pick up Brucie with two other girls but they wouldn't go in my car but it was in a realtime cutscene thing so I had to restart my game thank god for auto save :D.
gta4 freezing
Except for that X-Spider guy...
lol
(and above constantly as in since the game got released I have had it running in ps3).