sounds like I'm having the same problem, but I haven't touched my rear caliper, they seemed to have just quite all the sudden for no known reason. Tried bleeding them many times, and it still won't hold pressure. A friend told me I could have a bad seal in my master cylinder, but I don't know what else it could be.
Although, I did notice marks in my PRM skid where my brake lever had rubbed up against the skid, but the brake lever still goes all the way down.
luvin my '03 LE raptor
all prm skids
black outerwears shock covers
front ITP T-9 Baja rims w/ Bandit XC's