PMD info guide to fixing models [tutorial]
EDIT (22/06/2016): I completed verticle part and corrected few fixes there.
To access pmd/pmx info go File(F) -> Pmd Info(F). It is a very useful diagnostic tool for fixing models, however it is always in japanese (even in english pmdes). I will explain what most of these mean and how to fix them. If you know a fix to something I did not, feel free to write it in comments and I will update this guide!
NOTE: Verify button updates the information
NOTE2: Numbers underneath a criteria show the index number of bone/material/etc with the problem, for example:
材質名未設定 : 1 | ... △ 以下の材質は名称が未設定になっています.
This show that material with index number 0 is unnamed.