it is a document written in libreoffice 4.0.3
can_not_open.odt (application/vnd.oasis.opendocument.text), 932.95 KB, created by ondra.koncek on 2013-07-01 08:06:35 UTC
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Creator: ondra.koncek
Created: 2013-07-01 08:06:35 UTC
Size: 932.95 KB

Attachment is not viewable in your browser because its MIME type (application/vnd.oasis.opendocument.text) is not one that your browser is able to display.

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Attachments on bug 66440: 81782