Hi NJ.
I never did get anything solid out of the logs. The user believed they were seeing this 'hang' happen in another web app as well, so I started this as a local, client-side with the browser as the common denominator issue. I added our Clarity server's URL as well as our whole intranet (with a wildcard) to the user's Trusted Zones in their browser and they haven't reported anything since. I can't call this a resolution since it was just a stab in the dark. Good thing is we have this thread started, if I see this again or if anyone else does, we can add to this until we see a pattern in the tea leaves.
Line 2571 from the 'permissions denied' error is as follows:
function Fb(b){var c,d,e;$wnd.clarity.uitk.navigation.NavigationContextManager.setIsRendering
I don't know much about the files in gwt\com.ca.clarity.container so I'm not going to speculate. Oh well. Calling this a 'watch' issue for now.