Missing buttons and more in Chrome/Firefox, but not IE...

Today we're missing buttons and more (for example latest blog posts, poll content) in Chrome/Firefox, but not in IE. Any ideas!? Please see attached graphic. Everything is fine in IE.

If you can PM your url, I can look that for you.

Thanks a lot - it seemed to be related to a Javascript caching issue via CloudFlare. It's worth noting. After reducing the cache settings within CloudFlare all required buttons etc are now visible again.