I am unable to drag photos from my PC (Win 7) into the iPhone folder that opens up when the iPhone 3GS is plugged in to the computer. I can see the iPhone folder but when I try to drag photos in it I get an "x" on the photo and it doesn't "drop in." I can use iTunes to sync them but that is a PITA. I have googled this issue and can't really find a working fix. This is a 3GS running 4.2.1. Not upgrading because it is jailbroken. Any idea?