-end interface has to be changed, which is not an easy job. If you
-want to work on this, please contact the Gnus mailing list.
+end interface has to be changed, which is not an easy job.
+
+The nnml backend @pxref{Mail Spool} has a feature called ``group
+compaction'' which circumvents this deficiency: the idea is to
+renumber all articles from 1, removing all gaps between numbers, hence
+getting a correct total count. Other backends may support this in the
+future. In order to keep your total article count relatively up to
+date, you might want to compact your groups (or even directly your
+server) from time to time. @xref{Misc Group Stuff}, @xref{Server Commands}.