I'm sure irony of an AdSense publisher getting burned running AdBlock hasn't escaped you.
Neither Google nor AdBlock need to fix anything because Google doesn't want you running AdBlock in the first place and AdBlock blocks google syndication which is where the format previews probably come from.
I can see it as ironic, tho I'd imagine many people like myself use adblockers selectively depending on many factors (which computer they're using at the time, connection speed, which internet neighborhood they're in, their present purpose of being online). Far from freeloaders, as sometimes stated (not saying you did), savvy web users utilizing adblockers can still provide many benefits to publishers other than clicking ads... but that's all been said before, I'm sure. As the format selection in adsense interface is not itself an ad, there's no reason it should be blocked.. just sayin.