I've written some simple little scripts for our Mac workstations to  
mount volumes from our Xserve i.e. --

mount volume "afp://XX.X.XX.XXX/volumeName" as user name "username"  
with password "" (x's represent IP address)

I've also used --

mount volume "afp://username:[log in to unmask]"

I've also run these inside a Finder "tell", but apparently isn't  
necessary and doesn't make a difference in the following behavior.

These are put in the user's script folder in their Library and run  
from the Scripts menu. All has worked fine until upgrading to 10.4  
recently. Now, most of the time we have to run the script twice  
before it mounts the volume in question. The first time it's run, the  
machine acts like it's running the script but the volume doesn't  
mount and it generates no error messages. Running it again mounts the  
volume.

But this doesn't happen every time you run one of these. Sometimes it  
mounts the volume the first time you run the script. Also, it always  
works with the first volume you mount... in other words, if you have  
no server volumes mounted at all, the first script you run mounts  
that volume fine, but any subsequent scripts you run to mount other  
volumes usually fail on the first run.

Does anyone have any ideas what may be causing this? All this is  
happening on OS X 10.4.8 using G4s and G5s.

Thanks for any suggestions,

RJay