[horde] N00b installation problem, CentOS5.5 64bit - blank screen, no php errors

[centosguy at hushmail.com]

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Hi

I'm having problems having installed Horde on a 64bit version of
CentOS 5.5.

I can get the test page to output info succesfully but /horde
(default location) is displaying a blank page. I've seen a number
of posts on blank pages and read the FAQ but a lot of the posts
seem to relate to blank pages after login - I don't get that far.

My php installation logs correctly (I've tested writing to the log
etc.) and I can't see any errors in /tmp/horde.log.

Have I got a compatability problem with 64bit/horde/php?

Thanks in advance. Details about my installation are:

CentOS 5.5 final

/test.php shows:

Horde Version
Horde: 3.3.8
Horde Applications
Dimp: H3 (1.1.4)
Horde: 3.3.8
Imp: H3 (4.3.7) (run Imp tests)
Ingo: H3 (1.2.4) (run Ingo tests)
Kronolith: H3 (2.3.4) (run Kronolith tests)
Mimp: H3 (1.1.3)
Mnemo: H3 (2.2.3)
Nag: H3 (2.3.5)
Turba: H3 (2.3.4) (run Turba tests)
PHP Version
View phpinfo() screen
View loaded extensions
PHP Version: 5.3.3
PHP Major Version: 5.3
PHP Minor Version: 3
PHP Version Classification: release
This version of PHP has not been fully tested with this version of
Horde.
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