We're calling the correct start page as defined in the layout
properties (ours is MM7Help.htm).
I looked into this further:
Uing IE as the default browser, the same page
(whcsh_home.html) is also called first, (look at the history) but
the window content is immediately replaced with the Help topic
content, so only one window opens.
The problem seems to be that Firefox is not replacing the
content of the first window, it is instead leaving it alone and
opening a new window.
Jeanne