I've gone through two of the blue opaque snap-on covers sold in Verizon stores, and have encountered the same problem with both: drop it the right way, and the clips holding on the face plate will snap, rendering it useless.
I have a face plate from a shell/ holster combo my mother purchased (she was jealous of my phone? lol) and the clips seem thicker, but now they don't match, and for some reason, this drives me crazy.
All I'm looking for is a case similar to the snap-on cover I used to own, but with thicker clips on the front plate. I need to be able to take the back off, since I use the multimedia station dock and the car mount. Oh, and blue too :P