-Q10.B.5- get root's mouse bindings to work in my Tk application?

From: -X-  How, in Tk, can I XXX:

A10.B.5. Some window managers, such as mwm, define mouse button bindings
which cause Tk some problems.  Try saving off the window manager's startup
file (something like /.mwmrc for instance) and then copy in a startup
file from a login id that works.  Thanks to brad@NeoSoft.com (Brad Morrison)
for this invaluable tip!