Thank you for the signpost, but the string is still empty and each page number still says the string does not exist. Sorry if you know this and are still trying to sort it out!
'Fraid we still don't have the problem pinned down. I can see the thread, but only if I'm logged in. However, it looks as if other registered users (tagman, davegould) can't see it. Any other reports on its visibility or invisibility appreciated!