Having used Beta 2 of Office 2007 I was not expecting any problems when I
installed the RTM version however I'm unable to open a number of
spreadsheets, the follwoing error is displayed:-

The Worksheet was created in an earlier beta version of Excel 2007, and it
cannot be opened in the current version of Excel.

I've tried the follwoing http://support.microsoft.com/kb/926054 but the
registry keys do not exist and the Administrative template has no effect?

I'm running both Vista Ultimate & Office 2007 RTM version, is there a
soultion?

Thanks