Unless someone protests, I'm going to upgrade the CVS on pelix to 1.11.21 and fix the broken delta in the ,v file in the repository manually.
Well, if you wanted to protest you're too late now. :-)
Incidentally, it looks like it was a user error rather than a CVS bug that gave me different results on pelix, but an upgrade can't hurt... (The old CVS installation is still available under /pike/sw/pkg/cvs-1.11.5/ should anyone need it.)