Hi. I tried on Firefox and it does not happen. Maybe it happens on a different browser. In any case, you did the right thing in posting on the Themes forum. Eventually one of the members of the Theme team will look at this :-)
Thanks Airodyssey. I just checked with Firefox 5.0 & yes, the menus display correctly in front of the soundcloud widget. The browsers I can reproduce the problem with are Google Chrome 13.0.782.220 & IE8.