I have downloaded, installed and purchased FOP2. It's working great so far. I have come across 2 issues that may or may not be related - Running Trix 2.8.0.4 - Fix below.

When I would navigate to the Phonebook, I get an error message:

Notice: session_start() [function.session-start]: Server localhost (tcp 11211) failed with: Connection refused (111) in /var/www/html/fop2/config.php on line 39
no way

The other error was in the "Dial" area. If I entered anything, I would get a message box back saying "Could not parse response XML".

Line 39 is just a session_start();, so I figure it may be something simple with the session.save_path. I checked my php.ini and it is owned by asterisk (everything else would probably break if it wasn't). Checked the .htaccess just in case it was tweaked.. nada.. I remembered seeing this before and it was related to memcached. It wasnt started.

Start it up...
#/etc/init.d/memcached start
Starting Distributed memory caching (memcached): [ OK ]

Set it to start on boot
# chkconfig --levels 345 memcached on

Check it out
# chkconfig --list |grep memcached
memcached 0:off 1:off 2:off 3:on 4:on 5:on 6:off

This seems to correct both issues.