I'm using NextGen Gallery, and I'm using WordPress 2.7
(note: i had this problem in the last version of WP as well)
When I click on an image in a gallery, the image comes up on top of the page like it should, except there's a copy of the image ONTOP of itself, so that you have to click the copy in order to make everything function normally. It seems like a bug to me, except I think someone would've caught it by now. I tried reinstalling Next-Gen when I had the last version of WP, but that clearly didn't do anything. ANY help would be GREATLY appreciated!!
You can check out the problem on my page:
I'm using Mac OS 10.5.5, and tested this in Firefox 3.0.4, Opera 9.52, Camino 1.6.5, all three browsers yielded the same result.