i just use '*' at line beginning and expect a non-numbered list to appear like usually it happens in wiki markup... it instead just adds an indent:
- one
- two
Topic on Talk:Structured Discussions
Tracked at bugzilla:67833 ("List item CSS currently broken")
The same with numbered lists,
- one
- two
...they don't even get numbered properly. Are you not using the same parser as a wiki page? Thought it's up to the server (PHP thing, such as ?action=parse API) to return numbered content.
Interestingly, it is proper HTML element (ol and li); I'm at a loss here. Presumably the CSS was smart enough to bork it. 
Gryllida: It's just because they set overflow-x:auto on all elements within flow posts, and since the bullets and numbers are actually outside of the list element, they get hidden.
Thanks, I've updated the bugreport with that info.