That special version of prime95 is for SSE2-capable CPUs only, right.
"George" is George Woltman, the guy (at least, but most likely not restraint to) behind the PRP part of the client for GIMPS, and thus basically for the core code of SoB. His FFT routines also power P-1 factoring.

He used this prime95.exe version to test the new FFT routines, as a missed factor due to a bug is not as severe as a missed prime when PRPing. Some errors where found and corrected in this process.
The current version shows up only the bug mentioned by biwema so far.

I guess the schedule for Louie et al. is the following:

- Get SBv2 on route (it takes some effort, but increases performance somewhat)

I don't know if they will wait until the x87 code is available, I guess not. Those machines that benefit from it are those that don't benefit from the SSE2 enhancements anyway, so an update v2 --> v2.1 doesn't make sense anyway...
More likely seems to be a v2.1
However, they will wait until the 1M FFT bug is fixed.

- Finish SBv3
either with integrated P-1 factoring or:

- Integrate P-1 factoring into the client as a plugin