linux44-r8168 was upgraded as part of the update. I installed the 4.9 kernel afterwards (hoping the networking would work) and that also installed linux49-r8168. I also tried downgrading linux44-r8168 but no joy.
The latest linux-r8168 is 8.044.02-12 - this has problems for me.
Downgrading to 8.044.02-8 also did not work (although it did before the update!)
However, downgrading further to 8.044.02-6 has got the networking going again.