I’ve just upgraded to 5.1 from 5.0rc11 (which was working fine for me) and now when I try to load webfig, I get javascript errors and it fails to start. Winbox and the SSH console work fine so far. When I load http://router/webfig, all I see is the loading page. This happens in Firefox, Safari, and Google Chrome. With Firefox 4.0, I the web console shows the following errors:
[18:29:36.102] missing ; before statement @ http://router/webfig/engine.js:1
[18:29:36.159] parent.generateContent is not a function @ http://router/webfig/iframe.html:1