I've installed the Yosemite preview and WebSockets don't work for me on Safari 8.
The echo test page works on Chrome (with the secure checkbox set) but when I try with Safari it fails silently.
I debugged the page and what happens is that the WebSocket is created but its onopen event is not fired and the socket's readyState status remains stuck on CONNECTING (0).
I couldn't find any references to this problem, is there any configuration I may have missed that causes/fixes this?
Safari has updated (to version 8.0.10600.1.22) and the problem is now resolved.