Blizzard has quickly turned around a small update to solve several issues that surfaced after the game's release two weeks ago. Bringing the game up to version 1.02, the new patch most significantly fixes a problem that could delete a player's single-player character if a multiplayer character existed with the name.
Download the 1.02 patch here or get it by logging onto Battle.net.
You can find a full list of Blizzard's fixes below.
Major bugs Fixes a bug that deletes your single player or open character if you deleted a Realm character with the same name. Fixes several bugs to improve memory usage - those bugs could cause the game to slow down after playing for a while. Fixed a bug associated with ejecting the Play CD.
Minor Bugs Provides for more consistent closing of dialog boxes and pop-up screens when players hit the Esc key. Fixes a bug to allow faster drawing of the automap.
Improvements Will auto-close some NPC menus when necessary. The automap can be toggled when a waypoint is active. Game-log file names follow the format D2YearMonthDay.txt.