I have the same issue. I donated appreciated assets in excess of 30% of my AGI, so I should have a carryover into next year. Instead TurboTax is deducting the entire FMV amount which is beyond the 30% limit. When I trace the forms to see why, the "Charitable Contributions Summary" worksheet shows the stocks donated in the "Other Property" 50% Limit column instead of the "Capital Gain Property" 30% limit column like I would expect. Hopefully someone from TurboTax will be able to help with this bug soon!
