Oren wrote:

Start by telling me how you posted from a 192,0,0,0 network?

Is Google now anonymizing the posting IP of it's users?

No!! The posting IP is from "non-routable IP addresses",
best I can tell.

In crafting the header, Google has substituted one of it's own internal
LAN address's in place of the poster's real, external IP address.

Just as it always has done for out-bound gmail email.