So I have built a complex model. I even animated the camera a few days ago to create a simple and quickly fly by. Now, whenever I click on any of my keyframes, several of the elements of my model move in random directions. And the 'undo' doesn't put them back. I have a room model that I download from an internet resource. It remains still. Only the geometry I created goes on the blitz. NOTE I have never added any level of animation to the geometry itself. Only to a camera.
Here's my follow up in case anyone else has this issue. I went though and deleted all keyframes. For some reason, as soon as I clicked on any frame, it reset all the scaling and position data back to 1 and 0. Argh. I don't know what caused it, but I have been able to work through it.