Flash Uploader Security Error

Hey Guys,
The flash uploader for uploading media has randomly stopped working and the browser uploader does not seem to add images to posts anymore. When I try to upload an image using the flash uploader I get a Security error in red text appear on the screen. The browser uploader seems to work in the adding new media menu but not when trying to add images to a post. I have deleted wp-admin and wp-includes uploaded them again still got the same problem.

Any Suggestions?