My source tells me that that 661-7171 (Sammy) serial number still exists and the old 661-65** number (LG) was replaced with a 661-70** part number. The new 661-70** number is B/O'd and only the 661-7171 part is availalbe to order.
It would make sense that at this point Apple would rather admitt nothing but replace any screens with the Sammsung (661-7171) part as most of thses screen are bing replaced are for customers having the persistance issue. Multi replacements has got to cost more than any difference in screen costs. By B/O'ing the LG part they slove the issue while continuing to ship as many LG's as possible and only replacing with Sammy when required.
Also, While Apple has never had parts seperated via part numbers as related to supplier, in this case they do... I submitt this was known and that is why only this panel has two different order numbers for the same part on the same model/version of one product. In the past, they have always had one part number and the supplier did not factor into anything. You ordered the replacement part and the panel was whatever it was Tosh/Sam/LG/Sharp...etc.... They have also stated the they are to order the part they remove. Which means LG for LG and Sammy for Sammy - until now that is, when only one part is available.
This entire debacle is a major dissappointment.... In the past, early adopters of Apple product took a chance they could be affected, however always knew Apple would make it right. It's the cost of bleeding edge innovation. Now, it's not so clear. I don't think there are more problems today, I think there's been a shift in service resotration policy at Apple. Problems and mistakes happen, how we deal with them is what defines us as individuals - and as a company. I few rotten apples only spoil the bunch if you leave them in the crate and don't deal with them properly.
Daz