--- /usr/share/zsh/Completion/Unix/_screen.orig	2008-04-02 18:24:51 +0800
+++ /usr/share/zsh/Completion/Unix/_screen.orig	2008-08-15 21:21:11 +0800
@@ -98,19 +98,19 @@ 
     attached-sessions)
       sessions=(
         ${${${(M)${(f)"$(_call_program screen-sessions $words[1] \
-            -ls)"}:#*[Aa]ttached*}##[[:blank:]]}%%[[:blank:]]*}
+            -ls 2>/dev/null)"}:#*[Aa]ttached*}##[[:blank:]]}%%[[:blank:]]*}
       )
     ;;
     detached-sessions)
       sessions=(
         ${${${(M)${(f)"$(_call_program screen-sessions $words[1] \
-            -ls)"}:#*[Dd]etached*}##[[:blank:]]}%%[[:blank:]]*}
+            -ls 2>/dev/null)"}:#*[Dd]etached*}##[[:blank:]]}%%[[:blank:]]*}
       )
     ;;
     any-sessions)
       sessions=(
         ${${${(M)${(f)"$(_call_program screen-sessions $words[1] \
-	    -ls)"}:#*tached*}##[[:blank:]]}%%[[:blank:]]*}
+	    -ls 2>/dev/null)"}:#*tached*}##[[:blank:]]}%%[[:blank:]]*}
       )
   esac