This is almost identical problem which I faced a few days ago. I fixed it then, but now it\'s not working any more. Well, some of it works.
I\'m using AjaxFileUpload Plu
But why am I able to get data from $_FILES and not from $_POST?
Because you are not submitting the form, only the file input element.
It seems to be the plugin's behaviour by design:
In this hacked version, it submits the specified file type of input element only rather than an entire form
The jQuery form plugin can do both, maybe that helps.