I'm having a rather strange problem.
When I open a "new post" I can not click any of the media buttons.
If i try creating a "new page" it all works fine.
After clicking around a lot I figured out if I pushed just below the media buttons my browser opens the upload dialog box, not in a pop-up as usual, but on the entire screen as a seperate window. If i try upload an image I can't ad it to the post cause the only way to get back to the post from here is to push the backward button or go to the dashboard. In both ways my changes are discareded.