Actually I'd copied my entire /home branch but had restored only the Genealogy folder into the same relative location as it'd had had in the FC6 installation, so any environment files that were contained at higher levels in the tree were not restored.  Anyway, the db_dump and db_load solution suggested in the document Espen pointed me to seems to have taken care of the problem.

Much appreciation for the quick and helpful responses.

On 9/27/07, Adam Stein <adam@scan.mc.xerox.com> wrote:
Is it possible you didn't put back the file associations for Gramps
files when you reinstalled Gramps?  You did say you did a clean install,
so all previous file associations would be wiped out (regardless of if
you're using GNOME, KDE, or something else).  Can you open up your
backup copy (assuming it's the same format file)?

On Thu, 2007-09-27 at 12:04 -0700, Gayland Gump wrote:
> Good day,
>
> I backed up my genealogical files (Gramps 2.2.8  I believe) to an
> external USB hard drive on my Fedora 6 system.  I then proceeded to
> perform a clean install of Fedora 7.  I then installed the Gramps from
> the Fedora 7 repository.  Copied my files back to their original
> location in my user space.  Where upon I attempted to open the
> database with the Gramps 2.2.6 (I believe).  Gramps reported that it
> could not open my database because it was and unexpected file type or
> format.  So I obtained the most recent stable version of Gramps from
> sourceforge, installed it and tried again with the same results.
>
> Any help out there?  I just did a bunch of updates to the database a
> few weeks ago and really would rather not have to  go backe to an old
> backup copy.  Any help would be most appreciated.
>
> Gayland
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Adam Stein @ Xerox Corporation       Email: adam@scan.mc.xerox.com

Disclaimer: All views expressed
here have been proved to be my own.  [http://www.csh.rit.edu/~adam/]