Every time Cowon releases a new product it marks the start of a years long process of actually making the player stable. This was also the case with the O2, which was released with more issues than it had pixels. Cowon just released a new firmware update and this time they actually fixed something.
The most noticeable change is a video fix that allows for videos above 720p to be played. A number of other video related fixes were also made to improve overall stability along with improvements and fixes to other aspects of the player. Hit the link for full change log and download link.