After submitting a PM, it’s landing page Click-on-icon for options (I wanted to sign out) did not work (like there was no script to execute). Opening a forum page in another tab, however, worked fine.
EDIT: I tested this again with a test PM to that same someone (the forum wouldn’t let me send to just myself). It worked properly this time. The first time must’ve been a page download glitch. Sorry … or glad, depending on how you look at it. 😃
EDIT 2: Hold the celebration! (See next the post.)