WordPress.org

My code doesn't work

If your code contains the characters ]]> then you'll find that it doesn't - WordPress modifies this itself.

What's the maximum size of the embed code that I can save in a custom field?

WordPress stores the custom field contents in a MySQL table using the longtext format. This can hold over 4 billion characters.

A new box has appeared on my dashboard all about Artiss plugins

That's correct - all Artiss plugins will now add this feature to provide you with useful support information. If you wish to switch it off simply click on the "Screen Options" tab at the top and untick "Artiss Plugin News & Support".

Which version of PHP does this plugin work with?

It has been tested and been found valid from PHP 4 upwards.

Please note, however, that the minimum for WordPress is now PHP 5.2.4. Even though this plugin supports a lower version, I am not coding specifically to achieve this - therefore this minimum may change in the future.