[MudWalker] Unsupported version of client?

[Bradford Barr]

I keep getting an error in the main window of mudwalker saying:

==================================================================
    You are using an unsupported version of the client software.

    Please update by forcing a reload of the page and reconnect.
==================================================================

Is that mudwalkers fault, or is it the mud I am playing in?  If it is  
mudwalker how do I force a reload? Are there help files somewhere I  
could read on this?

Thanks in advance,

//Brock