Ubuntu 10.04 Update Flatlined (temporarily) my Ethernet Card

On my Biostar TH55B HD motherboard, I have on-board Ethernet connectivity. Did a kernel update on Jan 03, 2011 to the following:
 2.6.32-27-generic #49-Ubuntu SMP Thu Dec 2 00:51:09 UTC 2010 x86_64 GNU/Linux
The update wanted a restart, so I did. No connectivity after that.

Hmn....

Well, let's see if it's hardware or software. This box dual-boots Windows 7 and Ubuntu 10.04 64 bit LTS. Boot Windows 7, LAN connectivity works just fine. OK, let's go back to Ubuntu and start troubleshooting.

Works fine in Ubuntu now. Go figure.