recently i upgrade my server to the latest A/M/P
Apache version 2.2.9 (Unix)
PERL version 5.8.8
PHP version 5.2.6
MySQL version 5.0.51a-community

then i recognize a blank page issue.phpdebug shows nothing and after investigation finally i find its EMLH that cause the problem.
after disable EMLH all pages works fine.(i comment that line in mainfile.php)

now my question is do you reproduce this problem?

thanks