This is absolutely true! I am a lefty, and my bars were dropping to 1 and zero until I put the phone down. I tried it with my right hand and the bars didn't drop.
The spot that makes the bars drop is the lower left hand side of the phone (where the black line is). Lay the phone on a desk and just cover that black line with one finger and the bars will drop!
i only get a minor drop when i short the left side section with the bottom section. (i count 3 sections separated by black lines - dialectrics?) i can easily avoid this by not touching the bottom section w my palm. not really an issue.
a bumper will eliminate the issue, sure, but i may not even bother. my feeling is the reception with the antennas in an external config like this will be better in general, and the tradeoff is that you can short them in certain hand-hold configurations... solution: be aware of how you hold your phone.
no big deal, nothing new, not a 'deal-breaker' or even remotely a reason to return the phone or cancel an order. i honestly have to say i think people hold apple inc. up to such higher standards than other companies.. this kind of scrutiny, picayune investigations, are fairly silly. and likewise the complete generalizations that follow from them. how anyone could say 'apple botched this release', or 'apple always has horrible QA issues' is beyond me. they are far and away the most consistently high quality devices bar none. i have been an apple user for more than 20 years now, and while i've had several frustrating hardware issues over the years, they have almost always been handily resolved, and never really inhibited my use of the product too terribly. these screen issues, audio glitches, antenna questions, and the like, are not the norm, they are the exception, and fairly often, imho, are greatly exaggerated. yes, it's no fun to get a lemon, or to unluckily pickup a series at a point where apple has made a small design mis-step, but really... name me one other manufacturer with a better overall quality achievement...? not really.
i'm sorry if the little screen discolorations and audio glitches are a real problem for people - but i've personally never had an issue and i've had every model iphone, 10 or 11 models of powerbook, 7 or 8 desktops, couple xserves, myriad ipods, a newton, airports galore, and one appletv.
(...now of course i've jinxed myself horribly and the next things i get will be crap. lol.)