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:
- A custom wrapper to make setTimeout() work even when Javascript is disabled. (#1209)
- Restored the "script installed successfully" toast notification. (#1511)
- Scripts download more incrementally; the install dialog should appear as soon as the script metadata has been downloaded, not after the entire script is downloaded. (#1523)
Plus a variety of minor code cleanups and enhancements behind the scenes.