A post to the Titan Quest Forums (thanks Voodoo Extreme) offers Wednesday as the ETA for the first Titan Quest patch, along with detail on what the update for Iron Lore's action/RPG will offer:

Just want to let everyone know we are looking to go live with our first patch on July 5th. I dont have a specific time or specific patch list at this point.

As I mentioned before some of the key improvements will include:

    • Improved auto-placement of inventory items
    • Fixed NPC dialogue windows closing when NPC moves to avoid other characters
    • Added character back-up functionality which will help prevent corrupted characters
    • Improved multiplayer stability and performance

When the patch does go live it will be available to everyone via the main menu under the Check for Updates button.