Last week I had a Rosen OEM navigation unit installed in my new Prius with Sirius radio. The Sirius problem: When first turned on, the Sirius radio will not play until the Rosen is switched to FM radio mode and then back to Sirius. After switching back, it works okay, even if another radio mode is changed to another input and back, until the unit is turned off. When it is turned back on, the same thing happens. One caveat....if an Ipod is connected, the Sirius works okay even when first started. I was told to contact the installer (who was not the dealer) and they told me that it was a Sirius problem, and not a problem with the Rosen or their installation. I have another Sirius radio in my Dodge truck that works fine (does not have the delay problem), and I can find no evidence from the forums for either Prius or Sirius of this problem existing. I have a hard time believing their story that it is not a problem with their radio. Has anyone else had this problem? I would appreciate the inputs from anyone who has had this unit installed by a dealer, and whether or not you have experienced this problem. I will provide a review of my experience with this Rosen unit so far if and when I get this problem resolved. Thanks..