I have the problem of not being able to connect to itunes sharing on my network, as well as ichat using bonjour. I didn't use any ethernet drivers when installing iPC, and have internet working fine plugging it into my router, as well as sharing files between computers. Also my TM gives the ethernet error. Is there a fix on the dvd for this problem? I'm using a Gigabyte P35-DS4 with its Realtek 8111B ethernet.
I reinstalled now using the R1000 psystar driver for ethernet and everything now works. I did try the NVinject driver for my video card but it didn't enable QE/CI. I had to reinstall without video drivers, and run efi studio, which did the trick. Also, now my TM seems to be working normally.