Don't know if this helps anyone but I've got a:
EDGE card (1.45)
SanDisk 8GB Class 4 (1.6ms RA)
Turned on GTA and had it freeze twice in the space of about 10 minutes.
Backed up my mSDHC, formatted it twice (second time was accidental!), then copied contents back on and I've been playing fine...
My dog used to chase off my neighbors cat from our yard, till one day the cat stood its ground, and paw slapped the shit out of my dog, now the cat wonders thru my yard, and my dog don't even care anymore, he's like f that cat. Lol