I have two JIVE 5.0.2 instances where I'm seeing this. Using Chrome, when I go to the Registration page (../create-account.jspa or click the Register link) I am getting this error..
event.layerX and event.layerY are broken and deprecated in WebKit
They will be removed from the engine in the near future.
4c9e6e38af677db6408ba28d02e9e027.js:7460XHR finished loading: "http://localhost:8080/__services/v2/rest/browserEvents/1335982325918?e=".
The first two bolded lines are probably more relevant, the last few lines are maybe more specific to my server.