Passthrough via S/PDIF without pulse

[IriDium]

I would suggest installing XBian on a new (not existing) SD card (for the sake of $4 less for a 2g) and seeing if it works. If it does, then work backwards and see where it breaks. It would prove if it is XBian or your AV or setup.

If you have a working system, then copying the nginx settings shouldn't be a problem and git is just a simple install.

Don't install a new vanilla system on your current setup until you have verified whether it is H/W or S/W related.

BTW: As a system engineer. Always document your steps taken to install or do something. It is as important as making backups. You wouldn't send a letter to the IRS/HMRC/Hades without taking a COPY - right!!!