There is currently no Account Preference to allow the eBay Gallery images to be automatically added to each listing--that is a feature we hope to do for a future release. Sorry if my previous post wasn't clear on that.
Yesterday's release made it so that users would no longer have to re-select all the images they wanted to be used as eBay gallery images--now you only have to check the box (same as before) but now the first 12 images that you already selected for the listing will be automatically imported as gallery images.
As for the image border changes, if you plan on utilizing the eBay gallery images in most of your listings, I would recommend not adding image borders at this time. EBay's rules on the borders only apply to "their" hosted images (which the gallery & header images are), so to avoid any possible problems down the road I'd just stop adding them now. They will begin enforcing the no image borders policy (as well as the other image policies) sometime in 2013.
Hope that clears up any confusion!