Forum issue - error when I click "Mark all as read"

[Espy]

Anyone else getting this when they click "Mark all as read?"

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

If this occurred unexpectedly, please inform the administrator and describe the action you performed before you received this error.

It happens most of the time, and when the message appears, they aren't marked as read.

 

[Espy]

No-one else getting this? It still persists for me, pretty frustrating.

 

[Carl Spiby]

I get an error when I edit a post, something about only variables allowed.