The Greasemonkey script for tags that I'm using & linking to from my how-to is broken due to version upgrades of both Firefox and Greasemonkey. Ah... innovation.
In the meantime, I'm going to recommend an upgrade, for those of you who are stuck with busted technology. Johan's deluxe spiffy three-part tag, bookmark & ping script works with the new browser and greasemonkey versions, so let's all go there & download that, shall we? There's how-to's & instructions in his companion post.