Just found a bug which had me 3 day's straight trying to troubleshoot. Since I'm not a programmer and only a keyboard tuner, this may be helpful to those who move hosts.
I moved my entire site and custom template and custom front page style (e.g. define('THIS_SCRIPT', 'mainpage_index')

to a new host.
Old Host
MySQL-Version: 4.1.22-standard
PHP-Version: 4.4.7
New Host
MySQL-Version: 5.0.77-community
PHP-Version: 5.2.9
It should have a no-brainer until I started receiving errors such as:
Parse error: syntax error, unexpected T_PRIVATE, expecting ')' in /home/domain/public_html/forums2/global.php(607) : eval()'d code(168) : eval()'d code on line 1
and
two other plugins stopped working or loading correctly (Advertisement System by TZ and Frontpage Slideshow). The latter failed to because either Advanced Forum Statistics 5.8.1 and 6.6.1 was failing somewhere until AFS was disabled. Disabling your plugin resolved these problems.
I couldn't figure out why no stats were loading on my main defined page in index.php with the plugin enabled.
This morning I resolved it and realized that in my Stats on Custom Pages (OPTIONAL) section, the word "private" is a reserved word now in PHP 5.2.9 and possibly a few releases before and I could not call this PHP page in your plugin. Removing "private" from the list of custom pages I was calling fixed the problem.