We are still working on some of the outstanding CloudFlare issues. We are aware of an issue affecting IE users where all images are saved as BMP and are working on a fix. We will also be sending proper Last-Modified headers on HTML starting early next week (works on our end, waiting on a fix from CDN). And still tracking down the issues with posting/accessing sys.4chan.org.
I've gotten a few e-mails from Australian users about difficulty resolving 4chan DNS and accessing the site. If you are affected, please e-mail moot@4chan.org with more specifics like your ISP, and what the 4chan subdomains are resolving to (run "nslookup boards.4chan.org" and "nslookup www.4chan.org" from command prompt/terminal).