Also occurs on other timezones that are not complete hours.
EG:
The Zones, Asia/Riyadh87, Asia/Riyadh88, Asia/Riyadh89 are the same and suppose to be +0345. But I get +03424. Also the Abreviation is reported as ?? I expected this to actually be either an actual abreviation.

Confirmed. Also happens to newfoundland. Seems to be all fractional offsets as stated:

<?php
putenv('TZ=Canada/Newfoundland');
print date('h:i:sa d/m/Y O T') ."<br />\n";
putenv('TZ=Canada/Eastern');
print date('h:i:sa d/m/Y O T') ."<br />\n";
?>
output:
12:55:52pm 18/09/2002 -021800 NDT
11:25:52am 18/09/2002 -0400 EDT

NOTE: Time is correct. Offset is incorrect.

S

<?php
putenv('TZ=Canada/Newfoundland');
print date('h:i:sa d/m/Y O T') ."<br />\n";
putenv('TZ=Canada/Eastern');
print date('h:i:sa d/m/Y O T') ."<br />\n";
?>
[Wed Sep 18 14:47:59 2002]  Script:  '-'
---------------------------------------
/dat/dev/php/php-4.3.0dev/Zend/zend_execute_API.c(282) : Block 0x0832FD00 status:
/dat/dev/php/php-4.3.0dev/Zend/zend_variables.c(44) : Actual location (location was relayed)
Beginning: OK (allocated on /dat/dev/php/php-4.3.0dev/ext/standard/datetime.c:377, 32 bytes)
      End: Overflown (magic=0x2A8F0054 instead of 0x2A8FCC84)
      2 byte(s) overflown
---------------------------------------
02:47:59pm 18/09/2002 -021800 NDT<br />
01:17:59pm 18/09/2002 -0400 EDT<br />
/dat/dev/php/php-4.3.0dev/ext/standard/datetime.c(377) :  Freeing 0x0832FD24 (32 bytes), script=-

This bug has been fixed in CVS.

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every three hours; this change will be in the next snapshot. You can
grab the snapshot at http://snaps.php.net/.
 
In case this was a documentation problem, the fix will show up soon at
http://www.php.net/manual/.

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up on the PHP.net site and on the mirror sites in short time.
 
Thank you for the report, and for helping us make PHP better.