I'm not sure if this is in any way related to Atahualpa, but I have a display issue that only appears in IE9 and is apparently connected to a script on our site. It doesn't happen with Firefox, Safari or Chrome.
Refreshing the browser corrects the problem because the popup only triggers on every Nth visit.
I have contacted Aweber to see if they have a fix but I was also wondering - Is there any theme related thing this might be interfering with that I can change so it works correctly?
This is how it's supposed to look:
This is how it looks on IE9 after the popup appears: