Disaster Solved

[homburg at tips-Q.com]

For some reason, my upgrade from F10 to 11 was incomplete.
It turns out that it left the F10 KDE in place. Indeed, I
had a bunch of F10 packages including libraries, scim and
other critical components. For some reason, an earlier pass
of yum did not update a bunch of stuff.

I seem to have a stable, well working system again.

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