nikeshkm, I would doublecheck for .dat files. If you ever played around with media card encryption you may also have .dat.rem files. Maybe you did a search on hidden files and deleted then before, but go ahead and do it again, and be sure to delete all of them.
And do a battery pull for a good minute.
If that doesn't work, and you can't stand it the way it is, think about copying all your files over to the computer, formatting the card, then copy back just your files and not any dat files or anything else created automatically by the blackberry. Then try again. If all is well, you could then try copying over any data or working files created by applications, and test again.
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