One of the (very, very) few things I don't quite like in XenForo in it's current state is this:
When I start a new conversation (in this case with my inner self) ....
... and press [Start a Conversation]... XenForo presents me with a new browser screen and shows me this:
This little error message in a completely new screen takes my focus off my context and not only that... I need to press the browser's [Back]-button to return to where I was. Especially the latter I experience as rather user unfriendly. So why not display this tiny little error message inside an overlay?
(edit) : In fact, I remember XenForo already does display error messages inside an overlay in other areas, so why not here as well?