=== modified file 'lisp/gnus/nnimap.el'
--- lisp/gnus/nnimap.el	2013-07-02 10:38:58 +0000
+++ lisp/gnus/nnimap.el	2013-07-07 19:48:50 +0000
@@ -1326,6 +1326,12 @@
 	      (if (and active uidvalidity unexist)
 		  ;; Fetch the last 100 flags.
 		  (setq start (max 1 (- (cdr active) 100)))
+		(message
+		 (concat "Initial sync: Group " group
+			 ". Reason: "
+			 (when (not active) "active ")
+			 (when (not uidvalidity) "uidvalidity ")
+			 (when (not unexist) "unexist ")))
 		(incf (nnimap-initial-resync nnimap-object))
 		(setq start 1))
 	      (push (list (nnimap-send-command "%s %S" command