Yeah, upon examining the defective mag with guys that worked at the gun shop, we found that the slot that the mag release catches on the front of the mag wasn't machined properly. So it wasn't being retained properly, and the force of the recoil was enough to make it pop out.
I have been considering removing the magazine disconnect. I did that with my old SR9.
I posted in another thread about the light strikes with the XDs. After doing some research on the internet, quite a few people were having that issue, and believed it was caused by excessive oil/grease in the firing pin channel. I always take apart and clean every new gun before shooting it, but never remove the striker assembly to clean it. I did that once I found that information, and the whole firing pin channel and striker were packed with grease. I cleaned it thoroughly and then shot 200 rounds through it without issue.
Hk 45C, Hk VP9 9mm, Hk P30S 9mm, Walther PPQ M2 Navy SD 9mm, Walther PPS 9mm, Beretta 21A Bobcat, Spreewerke CYQ P38, Ruger LCP .380, S&W 360 SC .357 Mag, Patriot Ordnance P415, Patriot Ordnance P308, Kel Tec KSG 12ga, Swiss K31 7.5X55, BNZ 42 K98, Mosin Nagant M91/30 1934 Tula, Ruger 10/22 50th anniversary design contest rifle, Tikka T3 CTR