Upgrade to AUC TeX version 10 or later, and make sure it is
byte-compiled with Emacs 21.
+** PCL-CVS
+
+*** Lines are not updated or new lines are added in the buffer upon commit.
+
+When committing files located higher in the hierarchy than the examined
+directory, some versions of the CVS program return an ambiguous message
+from which PCL-CVS cannot extract the full location of the committed
+files. As a result, the corresponding lines in the PCL-CVS buffer are
+not updated with the new revision of these files, and new lines are
+added to the top-level directory.
+
+This can happen with CVS versions 1.12.8 and 1.12.9. Upgrade to CVS
+1.12.10 or newer to fix this problem.
+
** Miscellaneous problems
*** Self-documentation messages are garbled.