port outdated - not showing outdated port?

[Chris Janton]

port installed shows

   php5 @5.2.6_2+apache+darwin_7+macosx+mysql5+pear (active)
   php5 @5.2.10_0+apache+darwin_7+macosx+mysql5+pear
   php5 @5.2.10_1+apache+darwin_7+macosx+mysql5+pear

port outdated shows

  No installed ports are outdated.

port info php5 shows

php5 @5.3.0 (lang, php, www)

My question is "why doesn't port outdated show that php5 is now at 5.3"?

thanks.

8)
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Chris Janton  - face at CentosPrime dot COM
Netminder for Opus1.COM