hahaha, definitely a coincidence!

As for the spice used, it had been recrystallised only once, and it was not the whitest spice in the world. Rather yellowish I would say, I however reasoned that:

1) should the yellowishness come from dmt-N-oxide, then there is no reason why this shouldn't form a salt

2) should the yellowishness come from any lipid impurities then they would be washed off the after the dissolution of spice in the fumarate-saturated acetone. This is indeed what SWIM abserved; He dropped the spice in the solution, precipitate formed, precipitate sedimemted amd the acetone from above had a yellowish coloration while the sediment was much much whiter (but with a hint of yellow). This yellowish acetone could not form further sediment after addition of  more fumarate-acetone.

So, for SWIM the most likely explanation for the yellowishness is possibly lipid impurities. But that shouldn't matter when salting is done via this fumarate-saturated acetone method.