Text in boxes is invisible

[DaMysterious]

On two of my new thems I've found a problem in the upload section (text in boxes is invisible).
Does someone know which class is involved to change the background- and font color in the boxes (see pic)?
I did spit out upload.php with no results.

[Nibbler]

Try listbox

[DaMysterious]

Thanks Nibbler, that did the trick.