Looks like Dr. Krahn found another private SNP while analyzing someone's sequence trace for M222. L96 is just 42 base-pairs away from the M222 site.
From
http://ymap.ftdna.com/Name: L96
Type: snp
Description:
Source: other
Position: ChrY:13411850..13411850 (+ strand)
Length: 1
ISOGG_haplogroup: not listed
YCC_haplogroup: not listed
allele_anc: A
allele_der: G
comments: Downstream of R-L21*
primer_f: GGTGATGGATGAGGAGTAAAAA
primer_r: CATTCAAGATCCCAGAACTGTC