from my experiments,it has to do with certain 3rd party aeroplanes.
For example,with the Skunworks new Starfighter,i get a CTD after a few seconds of watching my replay.
With other aeroplanes,default or not,all is well.
Another issue also,is the fact that certain variables such as landing gear,are not recorded and played correctly.
In the F15 from DC Designs but also in the Asobo P-51 RENO model,the landing gear is displayed popping up like a glitch,even if is already retracted.