The most common one I run into is with volumes, when the full path doesn't already exist. Docker will just make the path, Podman throws an error. It's been called a "bug" in docker but the fact is everyone just expects the paths to be created. I want it to just work, not make everyone in the industry redo their dockerfiles to be "correct."
https://github.com/containers/podman/issues/6234
It looks like there was some work done to resolve this in 2023 and 2024 but I know this was still happening for me in mid 2025. Podman is technically correct here but functionally broken in a way that keeps pushing me away because I don't have time to deal with that :(
Running a docker container having side effects on the host seems bad. You've just convinced me a little bit I want podman, and not docker.