php5 ?

[eluser]Unknown[/eluser]
Hi All,

I'm new to CI and I'm trying to understand just how much "support" CI has for php5.

In the "Code Igniter at a Glance" portion of the documentation I read this:
"Note: CodeIgniter will run on PHP 5. It simply does not take advantage of any native features that are only available in that version."

But in the CI 1.7.2 release notes I read this:
"Compatible with PHP 5.3.0"

Can someone tell me what "compatible" means in CI terms? Does it support all the features or does it just work?