I've got a 2003 Corolla CE with crank windows. Everything works fine, but I have a rattle in the left front drivers door. Does anyone have an idea as to what is loose...before I open it up? I've heard about other owners with the same problem.

don't know about the 2003, but there's a window problem in older corollas (my driver's side window is set in stone, and every bump makes it sound like something really heavy bumping around inside the door)
the rest of the windows, which are rearly opened, are fine
drive either with your window fully down or fully up, everything in between kills it on the bumps