It's the same issue that I posted the other day. I looked at the script code and noticed that it doesn't match at least in width what you pick for your form width in the design screen. I think I made my form 460 wide and the script code references 482 wide. Height I just messed with in the html box until it was right but the script doesn't match. I'm thinking that's where my issue is coming from.
Built in padding
Here's the Colorbox version. Bottom of page.
My form is 500 but in script 522. I have examined in FF with Firebug it is 500 in width displayed.
Do not know what adding 22 does.