> > You've done something dodgy to the message numbering system, haven't you?
>
> Nope. It's possible that your history file got corrupted, or that you have it set up to "expire"
> links that haven't been followed in some number of days or weeks.

Just on the off chance that there's anyone still wondering about this, I've just realised what the problem was...

...the messages that were marked read depended on whether I was looking at http://www.rinkworks.com/rinkforum/ or
http://rinkworks.com/rinkforum/

Pa"relieved"ul