Security token invalid??

[Massacre.]

Okay. I was just having a conversation, and I can't reply because of this:

The following errors occurred with your submission


Your submission could not be processed because a security token was invalid.

If this occurred unexpectedly, please inform the administrator (http://www.pokecommunity.com/sendmessage.php) and describe the action you performed before you received this error.

[fenyx4]

I have the same problem occasionally as well. Usually by refreshing the page, or clicking the "Back" button and reclicking the button you clicked originally to reach the "Reply" page typically fixes it, it my case. Must be an April Fool's thing...