*** gnus-sum.el.orig	Fri Apr 14 08:01:20 2006
--- gnus-sum.el	Fri Apr 14 10:04:05 2006
***************
*** 5744,5749 ****
--- 5744,5754 ----
    "Update the info of GROUP to say that ARTICLES are read."
    (let* ((num 0)
  	 (entry (gnus-gethash group gnus-newsrc-hashtb))
+ 	 (entry (or entry
+ 		    ;; strip the backend prefix and try again
+ 		    (when (string-match "\\([^+]+\\+[^:]+:\\)?\\(.+\\)" group)
+ 		      (setq group (match-string 2 group))
+ 		      (gnus-gethash group gnus-newsrc-hashtb))))
  	 (info (nth 2 entry))
  	 (active (gnus-active group))
  	 range)