Karl M. Hegbloom writes: OK, I've gone ahead and downloaded GNU Emacs 20.5, to test out pcl-cvs there (I haven't built a GNU Emacs version since about 19.14!). Turns out that pcl-cvs-2.9.7 has the same behaviour there. However, reading the pcl-cvs info file, I found this: Tagging files ============= `t' Tag all selected files by running `cvs tag' on them. (`cvs-mode-tag'). It's usually preferable to tag directories at a time. Rather than selecting all files (which too often doesn't select all files but only the few that are displayed), clear the selection with `M-DEL' (`cvs-mode-unmark-all-files'), position the cursor on the directory you want to tag and hit `t'. When I tried tagging a directory, it in fact worked. But it seems to me that tagging individual files *ought* to work even though this Info entry says this is not the preferable way to use the tagging feature.