I downloaded and installed 2.5 a couple days ago and noticed a problem with the image uploader freezing when I'm trying to upload images from my computer. See here. As a rule I turn off the visual editor, and tried uploading with it both on and off with no luck. I even upgraded to the latest beta release (3/12/08) and still can't seem to get the images up.
I haven't been able to find any mention of this anywhere so I'm just wondering if anyone has come up against this and how did you fix it?