I have imported an archive (ZIP Tree XML Export) into my current NUXEO instance which is a FT 8.1. The archive was from an older version (5.something I guess). Beside some minor things like unsupported facets etc., which I solved outside of NUXEO, everything went well. The import was done with the blue import button in the left menu.
There is one thing which is very odd and makes the import unusable: All documents have as the creation date the date of the import and not the original creation date which is correct in the imported ZIP file.
E.g. an original document has
<dc:created><![CDATA[2012-08-23T11:07:02.56Z]]></dc:created>
but now it is from today.
What did I made wrong?