Created attachment 4253
"Focus" tab of settings manager
"Delay before raising focusing window" scroll is not disabled when "Automatically raise windows when they receive focus" checkbox is not checked.
It should be enabled only if specified checkbox is checked.
robo@mypc:~$ xfce4-settings-manager -V
xfce4-settings-manager 4.8.3 (Xfce 4.8)
Bug #6377 contains a patch for this.
*** This bug has been marked as a duplicate of bug 6377 ***