Turn off all your plugins… then check it. if its all good
(what would probably be true) start activating your plugins
on at a time to find the problem maker.
This happened to me several times and in 9/10 cases was a plugin…
the 1/10 time was a nasty code i pasted into my functions.php so if
turning off your plugins doesn’t work activate error report temporary
by changing:
define('WP_DEBUG', false);
To:
define('WP_DEBUG', true);
And paste in your questions the error or if you can fix them
and the try again…
Hope this helps 😉
Cheers, Sagive.