That css gallery was unstable in earlier versions of Opera and then smoothed out in v 9.01 I think it was. In 9.24 it is again unstable. Even on the demo page, if I move my mouse over the left hand area (this is with a wide enough screen that there is a lot of blank space over there), the pop ups pop up, even though I'm not over them. And the 'sushi' pop up is partly cut off.
That said, I think it might just be a poorly thought out layout on the demo page that is causing those problems, and the same may be true of your set up. Tables, in and of themselves, shouldn't be causing this.
Please post a link to the page on your site that contains the problematic code so we can check it out.
Bookmarks