--- observer_backend.erl.orig	2008-03-19 16:13:13.000000000 +0300
+++ observer_backend.erl	2008-03-19 16:14:33.000000000 +0300
@@ -85,6 +85,7 @@
 pi(P,Key) ->
     case catch process_info(P,Key) of
 	{'EXIT',_Reason} -> 0; % oops - bad timing, the process just died
+        undefined -> 0;
 	{Key,Value} -> Value;
 	[] -> []
     end.