@GoddersUK: a flaw is a bit of an exaggeration.. we just don't handle quotes within quotes, in fact I believe we explicitly strip them out when quoting in the UI.

At the moment, the process to convert from the [ ] (bbcode style) tags to HTML is regex based, so we are really just looking for text between a starting and ending quote ... to handle nested tags, we'd have to move to parsing the text which isn't the simplest process. I have it on my plate though so we'll see if I end up getting it done