could somebody help me out with firebug & code

I posted a threat a while ago about a videoplayer-plugin for wp 2.7 & in grid-a-licious theme,
“I′m want some videoplayer plugin with that nice thickbox or lightbox “fading-effect” on it, but it should be compatible to play youtube or viemo videos.”

I found this nice plugin called floatbox plus, the good thing – it runs with wp 2.7. the bad, there is a problem with the video thumbnails in the grid-a-licious theme (the default theme shows up the thumbnail of an video without any problem).

the 2nd bad thing, u cant “activate” the lightbox effect without that videothumbnail. I′m a rookie coder, but i think its a pretty simple thing to run this good plugin on the g-a-l theme.

i checked firebug and now the question, why is this area “softer” than the others? its exactly the part of the videolink & thumbnail! (look at the screenshot)

screenshot