In Ubuntu Mechanical snail reported:

Under Startup Applications Preferences --> Options tab, there is a button "Remember Currently Running Application". This sounds like it will let you pick a currently running application to remember. In fact, it remembers all running applications permanently.

Users may infer that "Remember Currently Running Application" would pop up a choose-application dialog box, which would presumably have a Cancel button. Thus they assume it is safe to press. (I did this, and apparently others have: http://www.google.com/search?q=gnome+OR+ubuntu+%22remember+currently+running+application%22 or http://ubuntuforums.org/showthread.php?t=1335047 )

Since the GUI provides no way to undo pressing the button (this is Bug #60863), it should be clarified what it does, by renaming it to something like "Permanently Remember Running Applications".

Alternatively, just remove the button, since it's broken.

Launchpad ref: https://bugs.edge.launchpad.net/ubuntu/+source/gnome-session/+bug/568185

Thanks!