I've heard people complain about that before... but I think it was mostly gen 1 LCPs and/or mags.
Mine is second gen, and I always load mine up with 7 rounds, even at the range for practice, and it works fine with all 3 of the mags I have. I've shots around 30 rounds of Speer Gold Dot hollow points (what I normally carry in it) without ever a hiccup... but mostly I shoot reloads. Many Tennessee Cartridge Co., as well as I have many many rounds from LAX Ammo since I got them at a very good deal with free shipping not long ago. I have only had my LCP about 3 months, but I've put at least 1500 rounds through it as of now, and its eaten everything great. If its jamming a lot, I'd probably have Ruger look at it.