I wouldn't recommend that.
When you create a copy of a report, it has a new CUID. Therefore even if you SAVE AS, you're really only renaming/copying the report. Next time you won't be able to promote it as the CUIDs won't match. The instances won't belong to that main report as it would have a different CUID.
The best way to get this working is to apply the code fix - as Matthew said, it's a bug - therefore the fix is in SP07.
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Kind regards,
Patrick Bulteel