Apparently Firefox 1.5 may not play nicely with Greasemonkey, whether the whole thing or the individual scripts. Let's see how this impacts tagging for categories, whether this requires some script reconstruction, & whether there's a new greasemonkey version on the horizon....
Update 12/01: Johan reports that the new greasemonkey 0.6.4 is out & available, for all of you who upgraded to Firefox 1.5. See Userscripts.org for the updated version, & for the wiki that will tell you how to fix any scripts that remain broken w/ the new version.
Note that it will not succeed in invoking any Greasemonkey scripts on pages (i e eBay) that use the document.domain feature to bypass the same origin security policy. Aaron Boodman fixed that bug in CVS on November 18:th, though, so 0.6.4 (or whatever the release version will be) will not suffer from this.
(It might on the other hand reintroduce the alert() on installing a user script again, so I might not upgrade myself, once it's out.)
Hopefully our scripts will still work in the new version.
Someone on userscripts.org also comment about this. Can you look into this? Thanks.