The v1.07 Upgrade Patch from Blizzard (1.4 mb) is currently available by clicking on the link or as an automatic update through Battle.net.

Fixes from v1.05 to v1.07

Serious bugs (crashes or freezes)

1. Fixed crashes associated with being attacked or killed by a Black Death (Zombie class). This includes the crash upon resurrecting after being killed by a Black Death.
2. Fixed the freeze upon touching a Hidden Shrine while equipped with only indestructible items.

Medium bugs (affecting gameplay)

1. Prevented players from becoming stuck inside a wall when Town Portalling down into a dungeon.
2. Fixed bug that made some Hell difficulty monsters too easy to hit. Beware.
3. Fixed the Mana Shield bugs that could make a player invulnerable and/or invisible to other players.
4. Fixed the bug that prevented Rogues from properly disarming traps on levels 13 through 15.
5. Fixed bug that rarely transformed unique items (like the Optic Amulet) into some other (usually mundane) item when saving the game and then starting a new game.
6. Prevented repeated castings (128 or more) of Mana Shield from disabling the casting of any more spells.
7. Fixed bugs that prevented items with the suffixes Thieves, Speed/Haste, Balance/Stability/Harmony, and Piercing/Bashing/ Puncturing from working properly.
8. Fixed the bug that caused Mana Shield to become less effective with increasing spell level.
9. Fixed the bug that caused excessive damage when a Mana Shield expired due to an attack.
10. Prevented bows with fire-hit damage from interfering with the behavior of Gargoyle class monsters.
11. Allowed right-clicking (casting/drinking) belt items in positions 5 through 8, while the Spellbook is open.
12. Fixed the bug that froze Lazarus (and made him invulnerable to arrows and spells) after player had entered his lair, then left (or died), and finally returned.

Minor bugs (graphics or sound)

1. When in effect, the Mana Shield graphic appears to all players.
2. The casting of a Nova spell is now visible to all nearby players..
3. Adria's books appear white now only if a player can read them.
4. Equipped shields always appear properly to all players.
5. Nightmare and Hell difficulty monsters now display the correct number of hit-points (HP).
6. In single player, the sound is no longer shut off by loading a saved game while Diablo is in his death throes.
7. You may now change the name of a character to an existing Battle.net account.
8. Fixed the incorrect display of special Battle.net chatroom icons.
9. Fixed the incorrect display of German text in the German version.
10. Fixed renaming character to existing character bug.

Fixes from v1.04 to v1.05

1. Battle.net accounts with unique names are now implemented. On Battle.net, you can claim a unique name for your character and protect that name with a password.
2. Added ability to /whisper, /squelch, and /un-squelch in and out of Battle.net games
3. Fixed potential memory corruption bug that occurred when casting town portal
4. Added data protection to direct connect networking module

Fixes from v1.03 to v1.04

1. Prevents invalid players from interacting with other players
2. Prevents invalid packets from crashing players from games
3. Fixes the Hidden Shrine freeze which was caused by touching the shrine when not holding an item with durability
4. Fixes the Black Death crash which occurred when fighting the monsters with an active Mana Shield and Full Health
5. Corrects the functionality of the Rogue's Disarm Trap skill

Additional fixes from v1.02 to v1.04

1. Prevents other players from casting illegal spells in town
2. Fixes duplicate item generation at the Blacksmith and Witch within the same game
3. Improves game speed over previous version
4. Improves the game's handling of latency and packet loss over the Internet

Additional fixes from v1.00 to v1.04

1. Corrects the NULL cell buffer errors and other draw problems. If you have a saved game that crashes with this error, the saved game will now be accessible.
2. Fixes intermittent crash in the Join Game screen.
3. Fixes data corruption problem which could cause a player to get locked out of Battle.net when creating a new channel.
4. Improves error handling for dropped network packets.
5. Provides more descriptive messages when unable to join a game. If you try to join a game you will know if it is full, your password is incorrect or you are unable to contact the game owner.
6. Fixes the problem with some equipped items not being seen by other players in multi-player games.
7. Numerous fixes to item integrity.
   NOTE: When the game detects a DUPLICATED item, one of the items will be removed from the game. A duplicated item will be destroyed when it is dropped. You will receive an on-screen message stating that the duplicated item was removed.
8. Prevents Lazarus's red portal from disappearing after leaving his lair.
9. Fixes the Level Advance Indicator remaining on screen after character attributes are maxed.
10. Fixes inaccurate display of game creation time.
11. Games shown in the list of public games on Battle.net will not disappear. The list will be refreshed only if the user closes and reopens the Join Game dialog.
12. Fixes problem with sound cards that do not support the Set Format command (i.e. ESS1888).
13. Fixes problems writing to the system registry.
14. Improves error correction related to line noise in modem games

New Features

1. /whois (player): Locate player on Battle.net
   A "/whois" command has been added to the Battle.net chat area. This command allows players to find other players no matter where they are on Battle.net. This will allow you to find a friend (or enemy) whether they are in a chat room or in a game. You will receive the name of the game or chat room that he/she is in. If that player is not logged on, you will receive a message to that effect.
2. Improves error correction related to line noise in modem games.