Ads module; subcategories will not load under Firefox 15.0.1

Just as the subject line says - the drop down list for subcategories in the Ads module will not display the subcategory value list when viewed with Firefox 15.0.1 on Windows 7. Both IE 9.0.x and Chrome 22.0.x work normally.

I am having the same problem with FF 18.0.1 :(

The same problem is with the DEMO SITE !!!

Someone told me to turn off the ADBLOCK in Firefox :)

it works :)