מאת Eyal Rozenberg (מפתח) בתאריך פבר' 18, 2012 · קישור קבוע

When using the number of lines as a comparison criterion, such two messages are indeed not dupes of each; if you remove this from criterion they will probably be determined to be dupes.

Also, there is a quick way to change the dupe check settings: Add the menubutton to the toolbar.