Help: display problems with flash and dhtml on same page

watchinthegame

For some reason, The flash element on my site is affected when I hover over menu items (animated by DHTML)
The flash element is totally separated from the menu items...I mean, the menu items are not inside the flash element, they are different objects.
The site in question is http://www.namotuislandfiji.com
I believe the problem may lie in the z-indexing of things... but it only goes wonky on Apple/Firfox. Safari is fine, all browsers on PC are fine. Of course my client uses Apple with Firefox.
I have recently put the flash object on a frmaed page to see if it made a difference, but no...
The problem is located towards the bottom area of the flash display when you hover over some of the menu items.
If you have any suggestions, please let me know.
Much appreciated