I never complained about YPN but today I'm seeing blank adspots on lots of pages. I hope this will be resolved pretty soon.
call them or write them email.. i had same problem and i wrote them but they didn't respond in 2 days so i call them, and it's fix now
side effect of the targeting issue. they will resolve this. we all just need to be patient. i have stopped letting the off target ads bother me. they are working on it. why woudnt they want the ads to be well targeted. i am sure know that better targeting means more click throughs and i am sure they like money just like the resot of us. this is a technology issue that they are working on. thats why its call "beta".