I'm having a problem when I hit the upload an image button I'm getting two upload dialog boxes popping up. Here's the sequence of events:
1. I press the Add an image button
2. Screen goes dark (as usual)
3. An old looking dialog box pops-up, then
4. Right after that the newer upload dialog box pops open over the old one.
5. If I close the new looking box the old one is underneath it and is exposed.
Here are screen captures of what both boxes look like: http://www.mediabaron.com/WP-double-upload.jpg
I've over written the WordPress core files with a fresh download of 2.8.4 but I'm still having the problem.
The problem occurs on Mac and Window with various browsers. Deactivating PicApp fixed the problem.