What firmware do you have on your Galileo?
Also did you build from sstate download or from git sources. If git, which branch did you build from.
I updated it last week. Running Arduino 1.5.3.
Built from git sources fails with networking. The 4.5gb sstate version works fine.
This is the steps I use to create a repo.
git clone git://git.yoctoproject.org/meta-intel-iot-devkit