Try adding a widget to your sidebar.
There aren’t any widgets – the widget page is empty
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 Eleven 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.
– re-uploading the wp-admin and wp-includes folders from a fresh download of WordPress 3.3.1.
All OK now. Had to do a manual download of 3.3.2 as the 3.3.1 download wasn’t available and the automatic download didn’t work.
Many thanks