Index: redmine-1.1.3/app/models/query.rb
===================================================================
--- redmine-1.1.3.orig/app/models/query.rb	2011-04-29 05:33:42.000000000 -0400
+++ redmine-1.1.3/app/models/query.rb	2011-05-19 10:00:21.265646521 -0400
@@ -254,8 +254,13 @@
   
   def add_short_filter(field, expression)
     return unless expression
-    parms = expression.scan(/^(o|c|!\*|!|\*)?(.*)$/).first
-    add_filter field, (parms[0] || "="), [parms[1] || ""]
+    if field =~ /^cf_(\d+)$/
+      # custom field
+      add_filter field, "=", [expression]
+    else
+      parms = expression.scan(/^(o|c|!\*|!|\*)?(.*)$/).first
+      add_filter field, (parms[0] || "="), [parms[1] || ""]
+    end
   end
 
   # Add multiple filters using +add_filter+