If you’ve got an existing edublog then you might have problems with formatting posts… the link / bold / block-quote buttons don’t work etc
You can fix this by pointing to wp-admin/upgrade.php and clicking there. Sorry it’s not easier at the moment!
So just got to http://yoururl.edublogs.org/wp-admin/upgrade.php (make sure you’re logged in) and the WSYWIG should be installed!
Apologies for the stress…