Not a nitpick -- a positive comment for a change... =D>

Watching Apollo 13 the other day, and being aware that all the launch footage was CG, not stock, I noticed something interesting.

The F1 exhaust plumes were shown with remarkable accuracy, right down to the "dark band" just below the engine bell (caused, as we discussed before in the LC forum, by the turbine exhaust which is released in an annular ring to help keep the bell relatively cool).

This little detail is just another indication of the lengths that Ron Howard went to in maintaining the accuracy of the film. There are, of course, areas where historical accuracy is stretched a bit (the on-board conflicts, merging several characters into one, mentioning widely-separated lunar features in one scene, and so on). But the technical details of the hardware, and the language in the MOCR and communications with the spacecraft, were done very well indeed.