Firefox Version: 3.0.1 (problem was present before the upgrade to 3.0 and 3.0.1, I'm unsure of which version the problem initially presented itself, it started about 6 months ago and I keep firefox updated regularly so a guess would be before 2.0.0.16)
Greasemonkey Version: 0.8.20080609.0 (I've reinstalled Greasemonkey since the problem was present so it likely started with a different, earlier version)
OS: XP SP2
Nature of Error: Whenever I click a .js link to install a script the following message appears "Script could not be installed ReferenceError?: GM_getConfig is not defined". I have disabled all other extensions other than greasemonkey and the same error appears. When I right click on the icon in the status bar it shows "no scripts installed!" When I click Manage UserScripts? nothing happens. However, If I go Menu>Toos>Add Ons and click Options for Greasemonkey it shows all of my installed scripts and I'm able to edit existing and create new scripts. Existing scripts continue to work, I'm just not able to update or add new ones.