On December 17, I quoted in full the post by L. Andrew Campbell which is quoted in part below (the quoted part being Campbell's quotation of e-mail to him from Arno van den Essen).
>As to the proof by 3 Russian researchers, >Arno van den Essen (an authority on the problem) >says >The "proof" is wrong as noticed by Moh. >Also Parusinski told Orevkov that there is >at least one more error in the proof. > >With the most friendly regards, > >Arno. > >P.S On Moh's website you can find his comments.
Moh has just posted 2 pages of comments to the arXiv; they make entertaining reading for those who are interested in the checkered history of this problem.