It seems like this setup works on it's own page, but it is when I view this page (with the flash menue and the Vimeo videos) on a second page, inside an iFrame when the invisibilty happens.. I tried to put the flash menue inside an iFrame too, but with the same result.

I have put a flash menue on a page where it controls the content in an iFrame. The iFrame shows a number of Vimeo videos according to click on the menue.
The problem is that as soon as the Vimeo player starts to play the video, the flash menue becomes invisible when using Opera. It is still "clickable" but even if it is inivisible. When clicking on it, the menue shows for a short moment while the new Vimeo video is loaded, but disappears as soon as it start to play.
The set-up works nice in IE, FF, Safari and Chrome.. but not i Opera. Anys ideas on how to fix this?