[SWFObject] Strange Problem in Firefox

[Benedict Steele]

Hi List,

I have a problem with flash movies overlapping in Firefox 1.5.

On this page: http://www.sportrelief.com/schools/index.shtml when the 
animation at the top left of the screen overlaps the background movie I 
can't get it to recognise mouseover events. To see it in action, try 
resizing the browser to 500px.

It works for IE fine. Is there any way to fix this?

Many thanks in advance,
Ben