Frustrated by Magento? Then you’ll love
Magento Option Labels not Saving
Magento’s UI layer uses metaphors more commonly found in Java GUI programming. You just call something like
addInput from PHP, and don’t worry about the HTML that’s produced.
One side effect that always to crops up when these patterns are used is out of control HTML forms. This Stack Overflow question covers a few of the ways Magento’s too large forms + PHP’s reasonable form limits can end up causing GET, POST, or COOKIE data to be truncated.