Hi,
I know 0.12.9 is a beta release, but I figured you'd want to know 
about this bug, unless, of course, you already do.
I'm running RedHat 7.3 on two different pcs.   Installed the newest 
pan (0.12.90) plus all the necessary newer rpms and gtkspell libs,etc. 
 No errors or anything unusual in the install. 
Now, when doing a Shift-S to save an attachment, it will not save the 
attachment to the correct directory.  In my case, I have my default 
save directory set to  /home/quimby/%g  ... however, instead of saving 
to , e.g. /home/quimby/alt.binaries.humor.skewed , it creates a 
directory actually called %g and saves it to that.  so the attachment 
saves to /home/quimby/%g .  I tried changing the save directory to 
/home/quimby/%G and it still saves the attachment to /home/quimby/%g 
(small g)...
Did an rpm -e pan and then installed the latest stable version 
(0.12.1) and everything is then back to normal....
This behavior was the same on both RedHat pcs. I have not tried it on 
any other linux distros or any other pcs.  It looks like this is the 
default behavior, I didn't have to do anything special to get this to 
happen...
Thought you'd want to know, awesome product by the way, PAN is the 
best.