I have a problem with media after I upgrade from 3.4.2 to 3.5 and 3.5.1. When I upload an image, it shows "An error occurred in the upload. Please try again later". I have try several times and it also has the same problem.
I try to deactivate all my plugin, revert to default theme, re-install my wordpress, and reupload wp-admin and wp-includes but the problem still exist.
I have read and try these steps but nothing changed.