Step 1: I click on a link to my forum inside an email, to try and view a forum post. This takes me to a 404 page.
Step 2: I move my mouse to the navigation bar at the top of my website and click on the link to the forums. This takes me to the forums.
STep 3: I click back over to my Gmail account, and try clicking once more on the link to my forum inside the email. This time it takes me to the correct post inside the forum — no 404 error.
Note: I actually just tried to repeat the above, but all seems to be working right now. I’ll let you know if the 404s persist again.
(Meanwhile, there seems to be no tinyMCE editor on your Simple:Press forum, as I type up this reply. This is the same problem I’m having on another site on which i’m using S:P. I have never managed to solve this problem, and it’s probably going to force me to give up S:P on that site. If you fix it on your site, please let me know what works! Thanks!)