Happens in Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv:1.9b3pre) Gecko/2008011404 Minefield/3.0b3pre but not in 2008011304 or SeaMonkey 2008011402. Steps to reproduce: 1. Enable autoscrolling (UI or set general.autoScroll to “true”). 2. Middle-click in the content area. → autoscrolling is enabled, the icon appears 3. Middle-click in the content area, but NOT on the icon. Actual results (like in 2008011404): The icon appears where you clicked, autoscrolling is still enabled. It is only disabled if you middle-click the icon itself. Expected results (like in 2008011304): The icon disappears, autoscrolling is disabled. Platform: Debian GNU/Linux testing, Xfce, GTK 2.12. Checkins: http://bonsai.mozilla.org/cvsquery.cgi?treeid=default&module=all&branch=HEAD&branchtype=match&dir=&file=&filetype=match&who=&whotype=match&sortby=Date&hours=2&date=explicit&mindate=2008-01-13+03%253A00&maxdate=2008-01-14+04%253A49&cvsroot=%252Fcvsroot A little guess: the patch in bug 188126.

That link above was broken by a bug; hopefully the correct link: http://bonsai.mozilla.org/cvsquery.cgi?treeid=default&module=all&branch=HEAD&branchtype=match&dir=&file=&filetype=match&who=&whotype=match&sortby=Date&hours=2&date=explicit&mindate=2008-01-13+03%3A00&maxdate=2008-01-14+04%3A49&cvsroot=%2Fcvsroot