100% Packet Loss, But Network Up and DNS Fine

Desktop openSUSE 12.3 64-bit, updated almost daily.

When I fired up Firefox today, it couldn't connect to Google (and the open internet in general). I checked my other devices and they reach the open internet fine.

Network Manager says connection speed to router on eth0 is 100 MBit/s, as usual.

ping google.com resolves Google to an IP address, but there's 100% packet loss.

Using Firefox to connect to the router is fine. I can get to the router's admin screens.

I haven't changed any network settings in about a year...

Wired connection 1
X Connect automatically
X System connection

IPv4 Address Method: Automatic (DHCP), X IPv4 is required for this connection
IPv6 Address Method: Disabled, Privacy Extensions: Disabled, [] IPv6 is required for this connection
Ethernet Restrict To Interface eth0, X Autonegotiate
802.1x Security [] Use 802.1.x authentication

Did I update to something broken?

Thanks for the help!