I also have the same problem, but the updated NetworkManager doesn't seem to help:
# yum info NetworkManager Installed Packages Name : NetworkManager Arch : x86_64 Epoch : 1 Version : 0.9.4 Release : 1.git20120328.fc16 Size : 6.7 M Repo : installed From repo : updates-testing
Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02)
I have a "Freebox v6" ADSL router.
I also have the same problem, but the updated NetworkManager doesn't seem to help:
# yum info NetworkManager
Installed Packages
Name : NetworkManager
Arch : x86_64
Epoch : 1
Version : 0.9.4
Release : 1.git20120328.fc16
Size : 6.7 M
Repo : installed
From repo : updates-testing
Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02)
I have a "Freebox v6" ADSL router.