The question is - how to fix it?
I have a BCK-08 ( http://www.dealextreme.com/details.dx/sku.8422 ) bluetooth headset that features better quality stereo audio (A2DP). It's built around a IS1621N ( http://www.issc.com.tw/stereo.htm ). It connects to an USB Bluetooth stick (logilink bt0007 with csr chipset, http://www.logilink.eu/showproduct/BT0007.htm?seticlanguage=en ).
Now Windows 7 has significantly improved audio handling. The device is found. When activated, it shows up in mixer as Bluetooth Audio Renderer.
However, while the headset mode always seems to work, I have to "remove" the device from the bluetooth list, and when I "add" it again, it just works.
Now what could interfere? Sleep mode, Skype, Realtek Audio Manager? Bad drivers? Problem with CSR chipset? Problem with IS1621N? BIOS USB settings?
I don't have any other devices so I can't swap. I think chances are litte someone else has this problem, but maybe has more experience in getting misbehaving hardware to work as it should.. :-)