1script - 7:37 pm on Aug 13, 2011 (gmt 0)

Are your "connection refused" and "network unreachable" errors mostly on August 4th? I suddenly see a number of those on a site previously without problems.

I wouldn't say specifically on the 4th. I see a lot of them dated anywhere between 3rd and 11th. In fact, 8th looks more like the epicenter to me.