upgrading to php 4.1.2

Rackspace just added the security patch to our version of PHP (4.0.6) and mentioned that if I wanted, they could upgrade to 4.1.2 for a $75 fee.

I was wondering if it would be worthwhile for me to upgrade? Will I have to adjust any of my existing php files to work with the newer version?

 

 

 

 

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