Similar (but not 100% related, linked Q is for Main Site): Graduated sites show "sketchy" offline page.
Most recent chat outage is giving me a "Sketchy Beta" theme on most of the chat pages. This screenshot from "Chat.StackExchange":
Also seen on the SuperUser room "Root Access". The StackOverflow chat was unaffected (by the theme change, not the outage).
Info: Windows 7 32-bit, IE8, ~18:30GMT