I recently went back into some of my old files and opened a composition of a panda's walk cycle. To my surprise, everything was completely messed up, aside from one leg. I hadn't touched the file in about 3 months, and I'm very confused as to why this happened. I have renders of both before and after available here:
*eek* Very weird indeed. There are some known issues with AI handling, but your shapes seem simple enough to not fall into that category. Do you use excessive grouping in the AI file? Are the items named properly? anything with multiple styles/ appearances? Trim Paths?