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Linux is NOT windows.
Just because your distro is setup so it auto mounts volumes for you, and appears to function like windows Plug & Play, it is far from it.
Remember, *nix write caches. This means you must unmount the Blackberry volume before removing the USB connection.
If you have an icon on your desktop for it, simply right click and select unmount. You will then be told when writes are complete and it is safe to remove the USB connection.