Matthew Handrahan for Gamesindustry.biz:

In a letter released to the Battle.net forums, [Blizzard CEO Mike] Morhaime describes the difficulties in attempting to predict the demand for a game ahead of its launch, and concedes that its preparation for Diablo III, “just wasn’t enough.” He also mentions numerous problems still plaguing the experience for some players, such as latency.

Diablo III has been a rare misstep for a game publisher with the Midas touch: It seems that the company was incapable of making a game that its audience didn’t absolutely adore.

Problems have abounded with Diablo III since launch – from the activation woes that Morhaime mentioned to its need to stay constantly connected to Blizzard’s online servers (party for copy protection and also to cut down on cheating). The game’s auction house is another sore spot with some game players, since it allows players with real-world currency to buy rare in-game items that they’d otherwise have to find on their own.

Diablo III is available for OS X and Windows.