Well heck… I’m stymied. The only thing I can think is a Leopard problem.
Is it just a brightness shift? Maybe in FCP you can open “item propeties” and enter 2.2 in the “gamma” field? Maybe FCP is just mis-reading the gamma as 1.8?
OR…
Are you seeing this footage on an external monitor? I know FCP has those “approximate” and “accurate” gamma settings that just affect the computer monitor, but don’t affect the actual video output.
sorry we haven’t been able to crack the code!