If you run into issues, look through the issue tracker and see if a bug has been filed. If not, file the bug.
This is just as important (if not more so) than filing bugs. We need to know whether each bug that's been filed is a problem for one person, or a problem for many. Try reproducing some of the bugs that have been filed, and see if they are problems for you. If you can't figure out how to reproduce the problem, make a comment on the bug, asking the person to describe their problem in more detail.