Display issue for embedded slidecasts when using Google Chromium for the Mac

Here goes, sorry if this shows up as a repost but it seems that Getsatisfaction.com ate my question. :(

I tried browsing my website using Google Chromium for Mac and found that my embedded slideshows/slidecasts were messed up.

For an embedded slidecast, the image that normally overlays the first slide, the yellow image that says it's a slidecast or has audio, is not displaying properly. It overlays the entire thumbnail, diagonally from corner to corner. Mostly. Only the top half of the slide is covered this way, and if I mouse over regions, a new mouse pointer shows up and that can "erase" some of the overlay.

Also, on subsequent slides, there's a yellow portion of the original overlay image that is still visible in the lower left hand corner of the embed.