- User scripts cannot run in any about: pages besides about:blank. (Security enhancement; #1375)
- Global, user specified, @exclude rules. (#1002)
- New @run-at metadata imperative, which supports value document-start, as well as the standard document-end behavior. Please see the documentation. (#1103)
- Support for @match metadata imperative, as implemented by Google Chrome. Thanks to Scriptish for original implementation. (#1377)
- Support for full regular expression syntax in @include/@exclude rules. Please see the documentation. (#1378)
If you are using it and notice problems, it's best to either let us know at greasemonkey-dev or log an issue (and be clear that it's with this version).