1.9 Problem on Full Screen mode

I have just updated to 1.9 and am having problems going in and out of full screen mode on a draft written in 1.7.

Either the doc won’t appear at all, or after several attempts it will show in full screen mode, then when exiting an error message appears reporting Scriv has stopped working and has to close. Cue another restart!

Am using Vista (yes I know…!)