Maximizing windows not respecting panel boundaries

[Conrad J. Sabatier]

Since upgrading all of my Xfce packages to their latest versions, I've
started having a problem with maximizing windows extending into the
regions occupied by the panels, with the overlapping part of the window
disappearing beneath the panels.

I've looked at every possible setting I could find in the Xfce settings
manager, but to no avail.  Does anyone have any advice?

Here are all the xfce packages I have installed under FreeBSD
(10.0-CURRENT):

gtk-xfce-engine-2.99.1
libxfce4gui-4.8.1
libxfce4menu-4.9.0
libxfce4util-4.8.2
xfce4-appfinder-4.9.3
xfce4-conf-4.8.1
xfce4-desktop-4.8.3
xfce4-dev-tools-4.9.1
xfce4-embed-plugin-0.8.0
xfce4-genmon-plugin-3.3.1
xfce4-mixer-4.8.0
xfce4-netload-plugin-1.1.0
xfce4-panel-4.9.0
xfce4-print-4.6.1_7
xfce4-session-4.8.2_2
xfce4-settings-4.9.2
xfce4-tumbler-0.1.23
xfce4-utils-4.8.3_2
xfce4-wm-4.8.3
xfce4-wm-themes-4.6.0
xfce4-xkb-plugin-0.5.4.3

Thanks!

-- 
Conrad J. Sabatier
conrads at cox.net