Currently Being ModeratedMay 5, 2013 3:52 PM (in response to bellakatt14)
Oddly, I remember having it too. I just checked my Iphone 5, and there is no little lock icon, but everything seems normal. I wouldn't worry about it, it doesn't change anything.
Currently Being ModeratedMay 5, 2013 3:58 PM (in response to bellakatt14)
I think the padlock has to do with screen rotation http://support.apple.com/kb/TS3805
Try toggle between the two settings and see if the lock reappears. If not then reboot the phone
Restart iPhone: Hold down the Sleep/Wake button and the home button together until the apple logo appears (ignore the ON/OFF slider) then let both buttons go and wait for phone to restart (no data will be lost).
Currently Being ModeratedMay 5, 2013 3:57 PM (in response to bellakatt14)
Ocean20 is right. I had forgotten, but yes, if you locked your screen rotation and then locked your phone, the icon would remain visible. If you want that lock back, just double click home, scroll left, and lock your orientation.