After getting this error message and not being able to solve the problem I decided to do a clean install of WordPress 3.0. The problem persisted so I contacted my webhost to ask them if they knew what could be wrong. They suggested me to try another clean install using a different database and so I did, but unfortunately that didn't help either.
- I'm using a clean install with the Twenty Ten 1.0 theme by the WordPress team
- I tried resetting the plugins folder by FTP
- I get the error while trying to switch to a different default header, an uploaded header and I'm sure I'd it with many other changes as well.
I'm out of ideas. Could anyone please help me out with this?