> Now I wonder what should be the best way to fix this.  I can just switch
 > the above two code blocks, which will fix the immediate problem (a C-g
 > will not prevent canceling the frame-focus redirected), but I think this
 > points to a larger problem of hitting C-g while processing unwind forms.
 > Of course binding inhibit-quit during processing of unwind forms could
 > be a source of problem in itself (if those forms fail to terminate).

I still have hare/tortoise implementations of Fset_window_prev_buffers
and Fset_window_next_buffers (for pure curiosity I attach the
corresponding part of a larger patch here).  Chong didn't want to
install them then because he considered it overengineering.  Installing
them means select_window could safely modify these lists with quitting
inhibited.

Calling `buffer-list-update-hook' would have to be deferred until the
end of `set-window-configuration' - no great deal IMHO.

Do you see any more problems?

martin