Having trouble changing your WordPress file size upload limit on a (mt) MediaTemple DV 4.0 with multiple sites? I was consistently stuck at the 1MB upload limit and tried everything I could find on the net from .htaccess changes, to wp-config.php edits, to uploading a php.ini file to wp-admin. Unfortunately none of these will work for a (mt) MediaTemple DV 4.0 with vhosts. The fix actually does require a php.ini edit but finding it is the trick.
post_max_size = xM
upload_max_filesize = xM
post_max_size = 10M
upload_max_filesize = 10M
If you are getting a blank php.ini file when trying the above, try adding this line of code into a WordPress template to find out what location your site is pulling its php.ini preferences from:
<?php phpinfo(); ?>
* Please keep in mind that not all servers have the same software versions and therefore setting PHP values can be different.