`image-animate-max-time' and the delay between sub-images defined
by the Graphic Control Extension of the image.
+** Progress reporters can now "spin".
+The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
+now be nil, or omitted. This makes a "non-numeric" reporter. Each
+time you call `progress-reporter-update' on that progress reporter,
+with a nil or omitted VALUE argument, the reporter message is
+displayed with a "spinning bar".
+
\f
* Changes in Emacs 24.1 on non-free operating systems