+2001-01-04 Gerd Moellmann <gerd@gnu.org>
+
+ * window.c (Fdelete_other_windows): Set window's window_end_valid
+ to nil when changing the window's start. Don't change the
+ window's start when its top position hasn't changed. If we do,
+ this will set the window's optional_new_start, which act's like a
+ force_start during redisplay with C-x 1 M-> under particular
+ circumstances (see report from Per Starback to emacs-pretest-bug
+ from 2000-12-13.).
+
2001-01-03 Gerd Moellmann <gerd@gnu.org>
* xdisp.c (forward_to_next_line_start): Reset it->c if taking the