[Jesse]

Originally Posted by NiteWave

any message in stderr.log? have you enabled opcode cache ?

Thanks, I didn't even know that file existed (looks ls specific) so I've now found that which revealed:

2012-05-14 12:03:06.721 [STDERR] lsphp5:/home/cpaneluser/public_html/wp-admin/index.php: symbol lookup error: /usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdo_sqlite.so: undefined symbol: sqlite3_libversion

Further investigation drew me to this - http://forums.cpanel.net/f5/undefine...tml#post632357 - which appears to be spot on, as commenting out pdo_sqlite resolved the 503. Although, 2 years on it's surprising php haven't corrected this

Cheers