I have found many fixes that have addressed issues that have plagued my many thousand firewalls that are managed. There was a bug fix that addressed my trusthost issues where when I unset a trust host it would set it to 0.0.0.0/0 rather than 255.255.255.255/255.255.255.255 null. Additionally when we would set new routes they would not restart the route daemon and thus leave my route map not updated. Based on the mass of vulnerability and exposure fixes I also found this update necessary.
At this point we have several hundred boxes staying stable for over a month with this release.
I have upgraded my FWF60D since a few weeks to 5.2.13 and so far no problems at the time. The FGT60D is still pending and will be upgraded in a few days.