Nothing obvious on those two either.
Bad news. I was investigating whether eBay has any published policy on the page embed or placement of background outside of the Description section of the listing and found this policy.
If you look at the "Some Examples" section for NOT PERMITTED, it states....
"Manipulation of areas outside the listing description, including changing fonts, colors, backgrounds, etc. in areas such as eBay headers, footers, etc.".
It might be best to get your templates changed now rather than wait.