for (var i = 0; i < 42; i++) {
}
When code leads the post, Markdown differs between the preview and the submitted HTML. The submitted HTML does not format the code while the preview does.
Bug does not repro on meta. I ran into the error when first posting this: https://stackoverflow.com/posts/2274573/edit
However, the revision log seems to be missing, so I can't prove my point.