Re: "Attempt to modify read-only object" error with set-frame-configuration

[martin rudalics]

A related question: With Emacs -Q `frame-parameters' gives me three
entries for "right-fringe" and "left-fringe" each.  What's the idea
behind these?  Do you see these as well?

((parent-id)
 ...
 (right-fringe . 10)
 (left-fringe . 10)
 (right-fringe)
 (left-fringe)
 ...
 (right-fringe)
 (left-fringe)
 ...))