If you're still crashing on the Headless Horseman event it's because of the tooltips on the pumpkin. Create 2 Macros to fix: Tooltips off and Tooltips on Tooltips off-/script GameTooltip.Temphide = function() GameTooltip:Hide() end; GameTooltip:SetScript("OnShow", GameTooltip.Temphide); Tooltips on-/script GameTooltip:SetScript("OnShow", GameTooltip.Show); Everytime you run headless horseman be sure not to mouse over the pumpkin until you hit the Tooltips off macro.
The problem with the crashing on zoning in and such is due to a bug with mouse over interact-able objects and such, a blue post mentioned it was noted and a fix is being worked on.