ERROR MESSAGES

I’ve had this problem since day one. I own the server and set the php memory_limit = 256M (it was 64M). I also added the define(‘WP_MEMORY_LIMIT’, ‘256M’) to wp-config.php. And, I’ve verified using phpinfo that php really is allowing 256M. This system has 12GB of memory with 9GB available.

I’ve read a hundred posts all claiming that increasing the memory via adding the define(‘WP_MEMORY_LIMIT’, ‘XXM’) would solve the problem but it does not.

I still get a lot errors like this:
Out of memory (allocated 3932160) (tried to allocate 393216 bytes) in C:\inetpub\blogs.hairboutique.com\wp-includes\formatting.php on line 635

Does anyone really know what causes this and how to fix it?