Hmm, interesting problem. I did a ping test that returned some warnings. It appears that it could be related. I googled the errors below. I have included the errors and a possible google answer.
Warning: time of day goes back (-1786707us), taking countermeasures.
Warning: time of day goes back (-1786534us), taking countermeasures.
,The reason it says time of day goest back, is your system clock is not
synced to the rest of the network. Try the command ntpdate. I had to
download the new version for it to recognize any time servers. (try doing a
search on google for ntpdate servers). Also if you cant ping your other
machines, take a look at your routing tables. Mine likes to reset
spontaneously. If it has reset then: route add default gw