We'll be performing routine maintenance on some of the Steam servers on Tuesday, January 29th, 2013 at approximately 16:00 PST (GMT-0800).
Game play for most users should not be interrupted, but Steam chat, game lobbies, matchmaking, and community web features will be unavailable. Content downloads may be temporarily interrupted. Certain multiplayer games that aggressively check for an active Steam connection may also be affected.
Last edited by TomB: 01-28-2013 at 05:55 PM.
Reason: Previously said the downtime was Wednesday, but the maintenance will actually be on Tuesday.