This is my RIG:
Windows Vista
dual core AMD Athlon 2.7 Ghz (OC)
Nvidia 9800 GTX+
4GB Ram.
It seems play long enough and one ends up 'mini-dumping', and if not someone else does; this is frustrating and also ruins team games. Today I mini-dumped on both the 5v5 games I played (after about an hour). Yesterday I played one 5s game which again resulted in me mini-dumping.
Since I purchased the game for xmas I've had more MDs than I can count on all my fingers and toes (and I have all my digits intact). I've set the graphics lower and completely turned of the shadows in the last few days but still the frequency of MDs remain the same (if anything probably increased in the last few days), albeit maybe I am just having a bad run of MDs as sometimes I can go without for a day or two.
Anyways is there a solution to this problem!? Is there anything that one can do to minimise MDs!? This is very frustrating 
/PLEASE help...rant over.