Hi, Frustrated, problem that has just appeared on my Samsung Galaxy W some thumbnails in my photos Gallery show a strange graphic - black background with keyhole shape in centre with lightening flash in right top area. this and others that show as normal show the same graphic when I click on them to open full size. I have exported these to my laptop which I can't open, message say files damaged. Lots of memory on SD card. Would appreciate any help to the cause and a fix to stop this happening on future photos. Thanks.