The Sigma DP1, the world's first digital compact camera featuring an APS-C sized imaging sensor, was first presented as a concept prototype at Photokina 2006. Since then prospective users have nervously been waiting for its release to market - in vain. Sigma has today published an announcement in which the company explains the delay by unforeseen image quality problems which resulted in a requirement to change the specification of the camera's imaging pipeline. Luckily things seem to be back on track now with alpha testing of the final design having started in November. Click through for a link to the official announcement.