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I'm not sure if adblock or google needs to fix this. A lot of people use this plugin. I don't see a feedback mechanism within adsense interface so just thought to mention it here.
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.
Turn off AdBlock, problem solved.
You're running a site that depends on ad revenue for income... but you yourself use the bane of our existence, and ad-blocker? "Very odd" doesn't begin to describe this inexplicable behavior.
Ad-blockers are a problem. By using them, you perpetuate the problem.
Imagine if you were trying to resell magazines with the ads removed... hold that thought.