Response to #2:
Line 31 in thread.tmpl:
Content visible to verified customers only.
Why use a dynamic selector ID there? Are the messages supposed to display different colors or something? When setting the theme to blacktar-border, the messages and usernames in the thread comes out white (just like the background). And, there is no "#msg1, #msg2, #msg6, etc..." in the stylesheet file. So, why not use a single class instead?