Just reported this new bug to ModernBill about a bug that I found. If you register a domain say for 2 or 3 years and pay for it via their interface.  The cycle and everything gets set correctly within MB, but the registrar only gets one year added.  I reported it, and I hope they find a solution fast.

Other then that.. MB has been dong very well for us. We have been holding out upgrading to 5.2 because they are having a few problems with it.