'''P3''':Non-trivial problems which probably affect a noticeable number of users.*Spelling errors in obvious places*The application crashes in very special circumstance*The user interface for a common functionality is confusing '''P4''': Problems which are non-critical or rarely occurring.:*Bugs that are easy to workaround*Spelling errors in rarely seen places '''P5''': problems which describe wrong behavior of the application, but rarely affect anybody noticeably.*in a seldom-used dialog, a control with an offset of a few pixels