I just plugged my N900 into my laptop to transfer some photos I took today. While I was there I decided to clean up a bit and I deleted some images. Now when I look on my phone and go to my photo album, I see a load of read-only files in with my pictures, but it won't let me delete them from the phone. They aren't there when I plug the phone into the laptop. Does anyone know how I can get rid of them?