There seems to be an issue with the forum topic posts in the latest release
In the topic post all the links now go through the newsletter app rather than directly to the topic url, as in the url in the topic now contains the below
causing a fail with the below reported...
Error code: EX1366
This error was probably caused by application Newsletters.
If the issue persists, disable it and contact the author for further assistance.
the email newsletter appears to be working ok