When I try to attach a file with 4.7Beta-2, using IE 6.0, a second smaller browser window pops up and the upload never really seems to finish. Even if I close the window, and try to submit, the window will pop up again and the node doesn't submit.
The file is in fact put in the right spot on the server.
Everything works fine using Firefox.
(Sorry in advance for any vagueness or mistakes - this is my first bug report)