Can we set the forum as "flexible width"?

One of my member has give me some feedback of the forum,
can i fix the problem?

the problem is :

the forum does not look good in 15" 1024*768 screen
view from IE is slightly better than Firefox


i mean the "forum page width" is too wide in a 15" monitor only

if you can set it as "flexible width",
it will looks good both in big or small screen sizes,
otherwise people have to use 17" or even 19" monitor to view your site

i don't have the same problem viewing all other forums

im using the 17'' 1024*768 screen bt its fine.
Im not sure why your member gets the trouble..