It mostly seems to be confusion about the impossibility of a perfect predictor. On LW we accept the concept of a philosophical Superintelligence, but among mainstream philosophers many disavow the notion of a perfect predictor, even when that is specified very clearly.
Steve+Anna at SIAI did a pretty thorough dissolution of Newcomb's problem with variable accuracy for Omega as part of the problem definition.
The content of John Baez's This Week's Finds: Week 310:
Includes
Note: The upcoming This Week's Finds: Week 311 is an interview with Eliezer Yudkowsky by John Baez.