Sample file were you can reproduce the error
P.xls (application/vnd.ms-excel), 116.00 KB, created by Guillermo Mario Narvaja on 2012-10-17 19:49:39 UTC
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Creator: Guillermo Mario Narvaja
Created: 2012-10-17 19:49:39 UTC
Size: 116.00 KB

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Attachments on bug 56105: 68726 | 115740