Text input field in BlackBerry
It seems there is a problem with input fields on BlackBerry devices (user who reported this problem uses OS 6.0). The input fields are blacked when you click there. Here is a screenshot uploaded by the user who reported the problem:
http://www.geocheckpointing.info/index.php?topic=28.msg77#msg77
I tried BlackBerry emulator and I found out the problem is probably not in my code because I saw the same problem when I navigated to the jquery mobile demos.