set_radio and set_checkbox have problems with value of 0

[eluser]kiranugur[/eluser]
[quote author="Dr Crypto" date="1259157052"]
For checkboxes that didn't require validation, I just set the rule to something inconsequential like (trim).

Hopefully this will save others the time that I lost.[/quote]

There is no need to set the rule to "trim" or smt else. Just leave it blank.

Code:

$this->form_validation->set_rules('category', 'Category', '');

This works fine for me.