rrruger,
It basically comes down to grip. Grip it correctly (and tightly) and you shouldn't have a problem. Personally I like the thumbs forward grip. I see 3 main things that people do that helps cause malfunctions:
1. folks not holding the gun high enough in the hand (not moving the firing hand high enough on the back of the pistol)
2. Not using the support hand to properly wrap around the front of the hand guard (often just using the tips of their fingers around the handguard/knuckles of the firing hand or putting their support hand under the gun "teacup" style)
3. Not using enough force while gripping the gun.
I personally think that small autos (think LCP or so) are less forgiving to improperly gripping the gun resulting in more malfunctions. Oh, and I don't THINK it has to do with bullet weight. But that's just my opinion.
I think this video is a pretty good demonstration of what to do (and what not to do). But again, that's just my opinion as well.
http://www.youtube.com/watch?v=6y7r6nPmLGI