Ethernet sheild(W5100) not working with Uno

It seems that there are many clones with wrong resistors. Almost all photos of this shield in ebay, have the 511 (510 Ohm) resistors.

I confirm that soldering of two 100 Ohm resistors at pins 1-2 and 3-6 resolves the problem with faulty shields

Thank you k1ggi you save me from hours of troubleshooting.....