This is a very minor bug, but I still think it is important to point it out (maybe it was already).
I voted another question to be closed as duplicate of PHP preg_replace \
Since the title ends with a backslash, the text generated is:
which results in
Though, linking to the question in this question (by just inserting the link) obviously creates an appropriate link. Maybe this automatic link detection / title creation should be done for comments as well, to avoid this issue (which I admit is a minor case)?
Other problematic characters:
Trailing white spaces. This question has a trailing space in the title, shouldn't those be stripped out?
Again, this is a limitation of comment Markdown, it works fine here: Link with trailing space .