Anyone ending here, the issue was observed by @baris and being discussed in this post:
https://community.nodebb.org/topic/13492/redactor-crashes-nodebb
The thread https://community.nodebb.org/topic/6665/adsense-problem fails to load with:
Internal error.
Oops! Looks like something went wrong!
I tried opening the thread from Recent, Unread and directly from General Discussion but all fail. I appended a /1 on the URL after noticing other threads and then the thread loads just fine. Safari works, it's just Chrome that's bugging.
Chrome 45.0.2454.101 (64-bit), El Capitan.
@julian No, but strangely enough it works with a reload of the error page.
Now that I have had a cup of coffee and some synapses started working again, I checked the dev console. I get a net::ERR_BLOCKED:BY_CLIENT.
Either way - problem is on my end and no posting before coffee! Apologies for the false alarm.