loosing metadata

hello, I observed a problem of metadata on my server WSS 2003 (with
Office XP), when I validate an Excel document containing metadata in a
list of documents with approval of the contents, the metadata of this
one are deleted (the Excel process was bloking to the opening). I have
remake the same experiment on a test server (WSS 2003 and office 2003)
and the same error reproduces.
Can you say to me if this case of figure this reproduced on your server
or if there is a patch.
thank you and good day.