QuickBooksForum.com.au

Hi all, I have just updated our 2009/2010 QB Prem to 2010/2011. When a previously entered customer payment was applied to the customer's invoice plus the final payment, the customer's balance became zero. However, when the customer's invoice is reopened, it now shows an underpayment of $0.68. I looked at the credits to be applied, which showed the same, but no matter what you do, the credit will not apply to the invoice. When I look at that customer's open balance report, it shows two small negative amounts, and two different small positive amounts which when totale equal zero, but will not apply to each other. I ran a verify data and a rebuild successfully but the problem is still there. Anyone have any solutions to this daunting challenge? I would love a solution.........