If you’re using Word Press and are having problems with HTTP or Internal Server Error 500 errors when you upload an image then try putting the below in your .htaccess file in the root of your WordPress install folder.
AddType x-mapp-php5 .php
AddHandler x-mapp-php5 .php
This forces your server to use php 5 rather than defaulting to php 4 when it does the image upload/resize/thumbnail create.
