Steam client updates have been released. This update resolves a few issues and adds some optimizations. The changes with this update include:

Added uninstall links to the Windows "Add/Remove Programs" Control Panel for installed Steam games

Fixed "The Ship" Half-Life mod not showing in the games list

Fixed double listing of Half-Life games in the Serverbrowser filter list

Fixed hang when uninstalling media or tools from the game properties page

Fixed backup and restore wizard to correctly handle very large files in a game

Significantly reduced memory usage during reinstallation of a backup

Improved speed of multi-disk backup and restores

Made the "the registry is in use by another process" error much less likely to happen
Like clockwork, restart your Steam client for the update.