When not intensively using the chat room, for instance when you are playing or browsing the web, set the interface on stand by mode in order to reduce the load on the server.
Clicking the button again or sending a message will put the interface back on fast mode.
Depending on your browser's default font size or how you resized the window, the layout may get disturbed and you may need to pick a higher extra space. (This option will eventually disappear as the cross browser css code gets improved.)
The archive viewer is still primitive, it allows you to fetch a 24 hour time span from midnight (your local time) of the selected day.