Have you tried:
– deactivating all plugins to see if this resolves the problem. If this works, re-activate the plugins one by one until you find the problematic plugin(s).
– switching to the Twenty Ten theme to rule out any theme-specific problems.
– resetting the plugins folder by FTP or PhpMyAdmin. Sometimes, an apparently inactive plugin can still cause problems.
I deactivated all plug-ins and this did not solve the problem.
We use the default word press theme and switching to Twenty Ten isn’t an option.
I have no idea how to reset the plg-ins folder by FTP etc. We only have three plug-ins, and only two of them are active.
After I’ve posted the message, the text I typed doesn’t even appear in the box.
I have also noticed that I can’t preview changes or view my post, via those buttons.
We use the default word press theme and switching to Twenty Ten isn’t an option.
Have you customised the default theme? Can you post a site url?
I have no idea how to reset the plg-ins folder by FTP etc
Please see the link I gave above.