Maybe you're using browsers or browser plug-ins which are incompatible with the site. Disable your ad blocker and try again. Also, I know Chrome sometimes does not display things properly on here. I never use Chrome. Firefox is simply the better renderer.
It may be an issue with your ISP or your router/modem. I've experienced some rather bizarre caching errors in the past which made the site's scripts not work properly or retrieve old versions of page content. Are you still having issues?