I don't know for sure, but I would assume that there are indeed 337 shared files. LimeWire tries to hash each shared file and that means it would have to open each file. If the files did not exist, LimeWire should show lot's of error messages.

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Morgens ess ich Cornflakes und abends ess ich Brot
Und wenn ich lang genug gelebt hab, dann sterb ich und bin tot

--Fischmob