"The development team behind Greasemonkey has just released version 2.0 of the extension. As always, it takes time before the new version is made available to all existing users and users who visit the Greasemonkey page on the website.Source: gHacks Technology News
"Interested users can install the new version of the extension on the "versions" page of it on the website where it is already made available.
"The new version introduces several changes that may make some scripts incompatible with version 2.0 of Greasemonkey. ..."
Details Greasemonkey 2.0 released, introduces changes that may break scripts