Sorry to start a fresh thread for this one, hints on this problem can be read here for context.
There seems to be a problem with the expanding menu plug in (originally coded by Ross Cairns and generously made available to everyone on the indexhibit family), which as Vaska stated in the above thread, might be in relation to a new Jquery version. The problem, in which the last section of the menu remains open (when it should be closed) can be seen here. It even looks kind of cool, but that last info section should be closed ;)
If anybody as any clues on what may be the problem it would be very much appreciated.
Shalom!