The first drag-n-drop of an external link onto the tab bar fails. STEPS TO REPRODUCE 1. start Firefox 2. drag a http: link from an external app, such as Thunderbird or a separate Firefox process, and drop it onto the tab bar background ACTUAL RESULTS 1. before the drop, there is no visual feedback when hovering the tab bar 2. the operation fails when dropping If I hover the tab bar, then move the mouse outside, then back over it - then I get visual feedback and the operation succeeds. The error only occurs once. The error does not occur if the same process is the drag source. EXPECTED RESULTS Visual feedback and successful drop. PLATFORMS AND BUILDS TESTED Bug occurs in Firefox 20081117 3.1b2pre on Linux
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