Last time I had this problem, the file system on my SD card was f'd up. You can search for JPGs using the built in WM search function, or if you have another program like Total Commander or Resco Explorer, you can use those utilities to search your SD card and your system. They will tell you whether or not the files are on your card or PDA at all. If they seem to be completely missing, i recommend copying whatever data u can off the SD card and then reformat the card and put whatever data back on to the card. This fixed my problem last time I had it...... I lost 600 MB of data/programs when it happened to me though
