Lion - Apps quit after screensaver activates

We have been rolling out Lion and came accross the partially obsucured login screen issue and applied the fix suggested here http://support.apple.com/kb/TS4135?viewlocale=en_US and it worked.

However the new twist is that when the user logs in all their apps have shutdown without savaing.

For security reasons our company insists that all workstations (Mac or Windows) implement account lock down after 15 mins on inactivity. So I need to find a fix for this.

Cheers

Phil