I don't want to delete the bookmarks, just the tags. For example, if I wanted to change a group tag from "blogging" to "blogs," I could batch add "blogs" as a tag to all bookmarks currently tagged "blogging," but then I couldn't delete the "blogging" tag from all of those bookmarks at once. I can delete it from each one individually, but that takes too much time. If I follow the steps you listed, I'd be deleting the whole list of bookmarks rather than a single tag. I like being able to globally edit/change a tag in my personal library, and would like the same functionality in groups. Does that make sense?

I don't seem to be communicating successfully. I know how to delete a tag from the group tag dictionary, but that's not what I'm trying to do. I am trying to change the name of a tag on already tagged items in a group. Whether through a tag cloud or through any other means, I just want the ability to change an existing tag globally across a set of group bookmarks. I still see no way of doing this. If I could delete a tag from a group of bookmarks using the "revise tags" feature, that would be fine, but I can't. I can add a tag to a set of bookmarks, but I can't delete a tag from a set of bookmarks. I can replace all tags with a new set, but I don't want to do that either. I just want to replace ONE tag with another on a selected set of bookmarks. Or, put another way, I want to edit a tag globally, in all instances that tag appears within a group. The tag cloud feature might be the more logical way to do that. If so, PLEASE bring it back!