Played 20 hours and no probs at all so far :)

Both have problems but PS3 has more than the 360. I have 2 PS3 (60Gb and 40Gb) and they both run it with no issues.

Look here to see more:

http://www.neogaf.com/forum/showthread.php?t=288359

The current results are:

PS3 with problems 22.22%
Xbox 360 with problems 7.76%

No Freezes.. running fine here

Mine is running fun, though I've only played it for a few hours.

I have not notice any problems with mine on the 360

There are no problems with 360 owners on this site.
Does that mean GTAIV's problems are more frequent on PS3?

Or are 360 fans not sharing their problems? 

Coca - judging from the NeoGAF thread, it's pretty appearent that the PS3 version is the vastly buggier version (3:1 rate on issues against the PS3).

I think, atleast on VGC, the sample size is too small that we can't give an accurate opinion. But NeoGAF has always been excellent on documenting fail rates.

No problem with mine 360 version so far.  I think 360 problems are people with 360 that is about to RROD or read disc error.

I totally agree with this.

I can also tell you that I know lots of people with GTA IV for both 360 and PS3 and none of them has had any issues (yet).

No freezing, there are frame-rate problems but I assume they're on the PS3 too.