I noticed on some server setups I could not do the following inside a .htacess file:
php_value upload_max_filesize 250M
php_value post_max_size 250M
I was getting an error 500 Internal Server Error with the above code in the .htaccess file.
What to do to correct this is create a file called php.ini and save it in the same location as your .htaccess file and enter the following code instead:
upload_max_filesize = "250M"
post_max_size = "250M"