#1 - Aug. 6, 2012, 1:42 p.m.
[flyable] is not true in other flyable zones if you don't have flight training, or if you don't have Cold Weather Flying or Flight Master's License (when in the appropriate zone), and [flyable] also correctly changes between true and false in Wintergrasp depending on whether the battle is currently in progress or not (wasn't always the case, and I really appreciated it when that was made to work).
It's not a huge deal, but it makes macros for mounting (or shape-shifting to flight form) work a lot better.