emacs redisplay dead slow in latest update

[Per Bothner]

After updating Rawhide today Emacs redisplay is dead slow.
The problem is when scrolling: even when only scrolling
by a single line, the whole window is redisplayed, and
it is done so very slowly - taking about two seconds.

This is only a problem with the default "Gnome window"
emacs - it is not a problem with emacs -nw (i.e. Emacs
in a terminal window), or other text editors I've
tried (kate, gedit).
-- 
	--Per Bothner
per at bothner.com   http://per.bothner.com/