May as well tack on to this.
I am flying CLT-FRA-BER on a single ticket, however it is AA into FRA and LH out. So I assume I will have to do the T2 to T1 and passport control. Right now my connection time is 1:50, so I assume that is enough. But as noted in the LH thread non *Alliance to *Alliance should allow for more time. Looks like AA arrivals are D gates in Terminal 2 and departures to Berlin are A gates in terminal 1.
The interactive map isn't really helpful. It doesn't calculate from Border control to A gates. Do I need to clear security in FRA or will there be signs for connections? The thread in the LH forum doesn't really address arrivals in D*.