>>UDATE-- I see a Message View Setup above the message window, but clicking the links don't appear to do anything.
>
>BTW, as is right now, you should should get a prompt to enter the value. If you do not see it, that is because there is a security in place which intercepts the javascript. But, as I mentioned, I need to found why the window is not refreshed after the save.

Here what I got in FireFox Error Console when I open Message View Setup menu:

Warning: Expected color but found 'C7CDBA' ('D7DBCE'). Error in parsing value for property 'background'. Declaration dropped.
Source File: http://www.levelextreme.com/wconnect/wc.dll?2,15,1322386
When i opened it only these lines has

lcMenuHoverOn ="D7DBCE"
lcMenuHoverOff="C7CDBA"

BTW I have NO security restriction on this site but can't open Select Message Area Width. :-)