Those errors may be the result of people trying to access threads that may not exist anymore, or have been moved to a private location. And with "On The Forums" displaying threads from non-public locations...
May I ask why the hell something like this should be logged though? I mean, the error log should only contain issues with the software, not issues with the users.
It isn't a users-specific issue, it's a SQL issue. It's the SQL logs that were causing this lovely thing. Anyway, should all be working now.
'Tis indeed. Thanks! Edit: Well… Creative Works is now doing the converse, showing an older ‘latest’ topic on the main page but being fine inside the subforum itself. Bizarre. not no more