gnome-terminal does not clean up on logout

[Joe Kelsey]

I normally run gnome-terminal with three tabbed windows.  When I logout 
using the Panel logout button, gnome-terminal dies but the shells 
associated with each tab do not die, but instead get reparented to init. 
  If I use the WM "close window" control to force gnome-terminal to 
exit, then the shells die also.

Has anyone else experienced this?  Does it make any difference that I 
use ksh93?

/Joe