Yep; there have been world-wide problems today. If you use a Mac you may be finding you can't use Safari to search the web. The problem is known to Apple, and there will be a permanent fix in due course, but if you need a temporary fix go to Safari Preferences, then Search, then disable the suggestions box, and all will be well (for now).
I had an automatic update this afternoon that has solved the problem.
It was annoying to say the least as I thought that it was something that I had done before I became aware that it was universal.