I intailly had problems with Fusion 12 starting up, I would get the main screen come up with no content (i.e no menu for site worked on). After many e mails to technical I finally managed to get things to work, the software was an upgrade from Fusion 10 and was on offer via a magazine. After the installation things worked o.k but after the update (March 2011) things stated to wrong as explained above. The final fix was to delete all files relating to Fusion 10 and a regisry clean (I found Crap Cleaner very usefull). After that things worked fine.
(Crap Cleaner can be downloaded from this site http://download.cnet.com/CCleaner/30...-10547048.html )