FOR ALL USER'S SAKE please use PMXEditor to do a PMX check by selecting File --> Validate PMX model (the bottom-most option) and fix the errors reported there before shipping out your edits, so that you don't induce your users with pains in the neck. Especially display-related issues, pretty much everyone fails at that
Almost every time, when one uses an edit from dA, he'll inevitably find out there are always problems - after all, nothing can be free of bugs. Serious issues include mis-rigs or rigidbody set-up failure which makes stuff look terrible, but there are also some more subtle ones that most people don't catch immediately, and when the time comes, bite a user in full force.
Normally, bugs are hard to find and fix. But then we're not talking about those complex rig/rigidbody problems here. Instead we'll talk about some PMX validity system-checks and sanity-checks that can be performed by PMXEditor easily, by selecting the bottom-most "Val