If you are using it and notice problems, it's best to log an issue or let us know at greasemonkey-dev (and be clear that it's with this version).
Enhancements:
- The User Script update code has been revamped and simplified to be completely integrated with the standard Firefox Add-on update system. Opting in and out of update checking and installing now uses the base Firefox settings. If you are opted out of automatically installing updates, there should be an "Updates" tab in the Add-ons Manager where you can review and optionally install them.