I've got it to work.. whilst letting the game verify game cache click the "when loaded, start game" (or whatever it says).. I had normally clicked close when it said it was complete with 2 seconds remaining, but I've let it run it's course (after checking the box) and it started up fully...
2 days ago before the new update i was happily playing fm12. i updated and now as soon as the sponsors screen goes black the screen stays black.. I've seen a few errors come up all the same (41)??? said it hadn't finished installing even though IT HAS :@
-tried verifying game cache - nothing...