Xfce session bugs

[Oblio]

Hello.

It seems Xfce session is kind of buggy on my system. Each time I shutdown  
the
the system, all programs except Xfce-terminal, which starts maximized on  
the
third desktop, Gaim, which starts on the first desktop, and Mrxvt, which  
uses
its own internal placing system, are messed up.
Opera asks me about restoring its session (which is what happens when it
crashes or is uncleanly closed), Firefox does the same (I use a session  
saver
for it), Gvim pops up on the wrong desktop, not the last one.
I tried removing all the sessions. I tried creating multiple sessions and  
choosing
different ones. I tried even starting xfce-session, or killing it.
Session saving is enabled, prompting for it is disabled (so it should be  
automatic).

Any ideas as to a way I can repair it? All I want is to see my apps  
appearing
where I left them, how I left them.

Thank a lot,
Oblio