It addresses some problems with Vista and Win-7.
A lot of people (including myself) were having trouble loading RoomShaker versions 1.76 and 1.78 under Vista or 7. I have now updated it and it now loads perfectly fine on mine

You can get it from the RoomShaker Website which has now moved to:
http://home.iprimus.com.au/bsnjames/roomshaker/
This update has taken a while because I've only noticed the problem due to the fact that I hardly use vista.