Steam Client
 * Fixed an issue on Windows 2000 requiring the SP4 update rollup 1 package to be installed for Steam to run
 * Fixed in-game overlay generating spurious D3D11 debug runtime warnings about CSSetUnorderedAccessViews when running on downlevel hardware
 * Fix regression causing a crash on exit in the in-game overlay
 * Small startup performance optimization to not initialize settings dialog data until needed
 * Fix the you have been logged in elsewhere dialog to not leave Steam in a broken state on Cancel
 * Support for a forthcoming news URL format change
 * Fixed Retail not prompting for a CD key when creating a new account
 * Fixed VGUI crashing when the number of panels was very large (ie, for users with huge friends/clan membership lists)
 * Decreased number of VGUI panels active at once for friends list
 * Decreased the time it takes Steam to launch some games
 * Fixed memory leak when resizing in-game overlay web browser
 * Fixed potential failure or client hang when failing talking to content server directory servers
 * Fixed overlapping text for pending group invites in the friends list invites section
 * Fixed error message “You don't currently have any games ready to backup..” when restoring a previous game backup
 * Steamworks - Fixed case where building an installer could randomly fail due to an error in the Microsoft crypto library