Servicers of loans backing non-agency MBS and other asset-backed securities are dealing with some harsh realities in the new world created by Regulation AB, a sweeping disclosure regime. The challenges confronting servicers in the post-Reg. AB world have been a major topic of discussion at industry conferences for more than a year. Because the rule requires that issuers divulge detailed performance information about the collateral backing their deals, servicers have been under pressure to provide