No drag and drop into Firefox 4

Hi all, I tried the recently released Firefox 4.0 binary from Mozilla.org on my (old) Ubuntu 9.10-based system with Trinity 3.5.11 (64 Bit). I found that I can't drag and drop files from Konqueror into Firefox 4 to open them. I filed a bugreport [1] for Firefox at mozilla.org and did some tests with Trinity 10.10, Kubuntu 10.10, and also with non-Qt applications on all systems. I found that drag-drop open files in Firefox 4 works with every application that is not Qt3 based, and doesn't work with Qt3 based programs, regardless of desktop environment. It works for Firefox 3.x. I promised to ask here if anybody would be willing to test (in case it's just me) and report back at the bugreport, so I'd appreciate any input from here. The Firefox developer who answered me also would take input from the Trinity developers, if there's something he could do on the Firefox side. I read that there's a port of Trinity to Qt 4 on the way, so maybe this problem might sort of go away on it's own someday. :) Should I also file a bug report at the Trinity bugtracker? I'd appreciate any input on this issue. Thanks, Sanne [1] https://bugzilla.mozilla.org/show_bug.cgi?id=645492