Which version of PHP are you currently using with your Joomla site?
Joomla 1.5 will run on PHP 4 and 5, but Joomla 1.6 and 1.7 both require at least PHP 5.2.4.
Simple Review is currently built using PHP 4, but PHP 5 has already been out for around 7 years now and is vastly superior to PHP 4.
I currently test Simple Review with the following configurations:
* Joomla 1.5 PHP 4 with SEF off
* Joomla 1.5 PHP 4 with SEF on
* Joomla 1.5 PHP 5 with SEF off
* Joomla 1.5 PHP 5 with SEF on
* Joomla 1.6 PHP 5 with SEF off
* Joomla 1.6 PHP 5 with SEF on
* Joomla 1.7 PHP 5 with SEF off
* Joomla 1.7 PHP 5 with SEF on
Because of the how time consuming it is to test against the above configurations I am considering dropping support for PHP 4 in the next major Simple Review release. The reason is not solely due to testing times, PHP 5 is much better to develop in, provides better features and will increase development productivity while reducing the amount of bugs.
So please vote now or forever hold your peace.