If you've not already gone down the rm -rf route, install Backupmenu, download a 'fresh-install backup' of the rootfs and optfs from here.
Copy them to the MyDocs/systemBackups/ folder (you may have to create this).
Then reboot your phone with the keyboard open and restore both.
You will then have to clear your MyDocs folder as that won't have been touched.
This will leave you with an almost (Backupmenu will be installed on those images) factory fresh maemo.