When using a test build that has possible fixes for numerous Drag & Drop issues, I have found that the asserts no longer occur:
http://www.wg9s.com/mozilla/firefox/
Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9b4pre) Gecko/2008021613 Minefield/3.0b4pre Firefox/3.0 ID:2008021613
When using a test build that has possible fixes for numerous Drag & Drop issues, I have found that the asserts no longer occur:
http:// www.wg9s. com/mozilla/ firefox/
Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9b4pre) Gecko/2008021613 Minefield/3.0b4pre Firefox/3.0 ID:2008021613