PHP 5.2.1 and the hard time with vbulletin 3.6.4

[Abdullah Ibn Hamad Al-Marri]

Hello,

I just used portupgrade -f last night.

Here is the error I got when I upgrade to PHP 5.2.1_2 when I try to
log to the admin Area.

Warning: preg_replace() [function.preg-replace]: Compilation failed:
lookbehind assertion is not fixed length at offset 13 in
/includes/functions_login.php on line 40

Here when I try to go to advanced reply.

Warning: preg_replace() [function.preg-replace]: Compilation failed:
lookbehind assertion is not fixed length at offset 8 in
/includes/functions_wysiwyg.php on line 149

Fatal error: Maximum execution time of 90 seconds exceeded in
/usr/home/bbwww/www/includes/functions_wysiwyg.php on line 189

I'm using FreeBSD 6.2, Apache 2.3.4, and PHP 5.2.1_2

Thanks in advance for your kind help.

PS: could someone give the syntax to use portdowngrade to to downgrade
PHP to PHP  5.2.0 date 20 Jan 2007 09:17:33
-- 
Regards,

-Abdullah Ibn Hamad Al-Marri
Arab Portal
http://www.WeArab.Net/