Comment 22 for bug 401055

Info on using xtrace here -- http://xtrace.alioth.debian.org/

I've roughed up a page on debugging client XErrors since these seems to be a pretty common class of error, and we didn't seem to already have a good knowledgebase for people on how to deal with them:

  https://wiki.ubuntu.com/X/Troubleshooting/XError

It would be majorly helpful if you guys could flesh that out further since you all probably have more experience with the tricks of debugging these kinds of issues.