Please upgrade to 2.2 here.
The 2.0 and 2.1 branches are no longer being updated.
Issue With Spaces in Names?
This discussion is related to the Quotes
I believe there might be an issue with quoting and linking to usernames if the username has a space. In the example below the only difference in the formatted HTML is that one user has a space, and the other doesnt, making the two quotations end up getting styled very differently.