POST object has textarea contents empty

[eluser]Unknown[/eluser]
Guys, im scratching my head around this one.

I have this website that basically contains a few forms that are filled in by the user. The user then can download that information in human readable format (pdf) or machine readable format (xml) but I'm having a slight problem submitting textboxes.

I have a few of them, for instance in the description section, but when i access the $_POST['Desc_Desc_desc'] value, it's empty even though i can see content on the textarea. The weird thing is that when i use firebug to inspect the element, it shows the element as if it had no contents..

Can anyone figure what is causing this strange behavior?