> > > Different sizes? > How old is the IPaQ? Have you looked for a firmware update? same sizes (1g), 1 yr, and fully updated. I fixed the problem last night apparently, by reformatting them in the laptop multiple times. The first reformat and the second did not solve it, but after three, all the cards are working in all platforms. Thanks -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist