mentioning someone in topic causes 403 error

[robt100]

Been replying to my latest thread asking about carbs. Miniliteman has been very helpful with information, but when I tried to tag him in a post using the "@" along with selecting/typing his name, when that is then left in the post it fires off a 403 error when I click post. without the tag it is fine. Not sure whats going on there!

[daria22]

Sounds like the site's firewall is flagging the mention markup as suspicious. Worth reporting to the admins with the time it happened so they can whitelist that rule.