I just got the new Samsung Galaxy S "Captivate" for At&t. Because of the relatively low battery life i went into the display and sound settings, unchecked the "autoadjust screen brightness" option and then turned the slider for brightness all the way down. However, every couple of days the slider works its way back up again to around halfway brightness without me doing anything. The "autoadjust" checkbox remains unchecked. How/why is this happening? Also, this same thing happens with the System Volume slider. What can i do about this?