Updated from 3.0.9 to 3.0.10 on three different servers, to give the blank page of death...
All servers on PHP 5.6.8
Joomla 3.4.4
Linux
Reverting to 3.0.9 restored it all...
yes, I am sorry, the update of the cart module was it. I overlooked that the forumposter used a custom layout ( good practice actually). I reupped the AIO asap.
In case someone else has a blank page after updating the Aio, just download the AIO again.
What me really wonders is, how we overlooked it.
http://forum.virtuemart.net/index.php?topic=131419.0