[MetalChris]

Just used the 'Mark Read' button at the bottom of the listing of my 'Subscribed Threads' and received some unexpected results. After selecting the threads that were incorrectly marked as unread, then clicking the button, I was forwarded to the forum main page where everything had been marked read. I then returned to the listing of my 'Subscribed Threads', and all are now marked unread.

 the 'mark read' button at the bottom doesn't operate on the selection you've made.
it's a general mark all forums read button.

Ah, thanks for the clarification.

but there's indeed a bug with subscribed threads becoming unread again.

Certainly not a high priority, but it will be nice if this one is ever squashed.