Hi again, Paul.
Thank you for your prompt response!
The problem counter seems to have corrected itself! I have only made the following changes since reporting the problem here several hours ago:
a) deleted all the 700+ temp files from my miniBB's shared_files directory (related thread: Hundreds of zero byte files in shared_directory
b) deleted 20+ members (spammers).
c) banned a few IDs and IPs.
Could any of these actions have had an impact?
Is it kind of specific forum (closed, read-only, post-only)? Does it contain any topics inside of it?
It is a members-only forum, which contains 238 topics and (now correctly reading) 1863 replies.
To adjust the wrong count of topics, it is in most cases enough to create a topic and delete it.
I see! Thank you, I will keep this in mind for future reference.