I had run out of space on / on the IPCop box. The installer sets /var/logs as the largest partition because once you install IPCop its supposed to sit forever and just log stuff. So when Update Accelerator installed it stored the update to /home/httpd/html/updatecache by default. Needless to say the partition filled quickly after downloading all the updates required for Windows XP. As a fix I moved the updatecache folder to /var/log/updatexlrator/updatecache and put in a symbolic link. Works like a charm and still have plenty of room!

cd /home/httpd/html
mv updatecache/ /var/log/updatexlrator
ln -s /var/log/updatexlrator/updatecache updatecache
chown nobody:squid /var/log/updatexlrator/updatecache -R
chmod 775 /var/log/updatexlrator/updatecache -R

Then you need to edit /etc/httpd/conf/httpd.conf to enable HTTPD to use symbolic links.

nano /etc/httpd/conf/httpd.conf

Edit this part:

    Options ExecCGI
    AllowOverride None
    Order allow,deny
    Allow from all

and change to:

    Options ExecCGI FollowSymLinks
    AllowOverride None
    Order allow,deny
    Allow from all

Save the file:

Ctrl+O to write out file.
Ctrl+X to exit.

At the prompt type:

killall httpd
httpd -DSSL