I'm with Josh, but the same thing started happening on my site (long after I installed the table wrappers). I'm not sure what's causing it, but I don't think it's the table wrappers (it's the same script for every table, so if it's the table wrapper it should be happening to every table).
Sorry, I didn't see it before on your site cause I had my resolution at 1600 x 1200 (I had to drop down to 1024 x 768 to see it).