I've been looking though some of my questions and answers and realized that some of them are the highest quality that I want them to be at.  Is it bad protocol to go back and cleanup questions and answers to make them a higher quality?  For example a question with multiple edits/updates cleaned up to a single question, but with the same material.

[Here is one of my questions](http://superuser.com/questions/184868/system-critical-error-kernel-power-and-crash) as a reference.