I get this too, but I've been wondering if its just me bouncing off the rev-limiter and I'm not even knowing.
Only happens in first, stutters badly, have to change gears.
I'm running 13PSI, I put in new BCP6RES I think, at .8, they have only done 500kms, and my originals weren't fouled either.
I have had this problem on a range of plugs from coppers to plat's, .7 - 1.1, on stock and high boost, on 6 & 7 heat ranges?