Upgrading PHP 5.2.17 to 5.3
<p>Our server currently runs PHP installed as CGI in Apache on Cent-OS.</p>

<p>What are the advantages/possible problems with upgrading from 5.2.17 to 5.3? My dedi host says that it will most likely break my sites, but hasn't given any actual things that could break.</p>

<p>Our server is 98% WordPress with a bunch of custom functionality. Where can I find a list of deprecated/changed functions, changed format, etc.</p>
