[Anseur]

One smell suggestion, you have the background set to use the same CSS as whatever the forum's forum-row is set to. This is fine except if you are using a texture for the forum row, as the CSS for the forum row does not currently have the repeat attribute, therefore depending on the texture used the background of the chat box can be half texture and half color. And of course as the chatbox can be made bigger sooner or later the user will see the gap however big the texture used is.

I fixed this on my forum by just adding the repeat to the forum-row CSS, but you could perhaps at this to that div it's self to avoid this cropping up for your installers.