Looks like it might be Chrome's internal DNS cache causing the problem?
HTTP Error 0 basically means a connection couldn't be established with the host. Either it couldn't resolve with DNS, or less likely, the host not responding to requests.
As an aside, you can click on each failed entry, which will take you to the network tab and get more information about the request.
Something else you can try:
1. Close all tabs expect 1 being about:blank or net tab page.
2. Clear cache (time: everything), no need to clear anything else.
3. Go to: chrome://net-internals/#dns
4. Clear Host cache.
5. Quit Chrome (Ctrl+Shift+Q)
6. Start up Chrome again
7. Hope it works?