I suggest that if a user other than the topic submitter makes a change to the topic that is reflected in the Topic Log (e.g., tag/title/group change), then the topic submitter receives a notification.

This may or may not apply to topic deletion and/or topic locking—to be discussed.

I was testing topic tag filtering and it didn't seem to work as I expected.

I was trying to filter out a topic with a main.sub style tag, but without a main tag.

I set the filter to main expecting everything nested undeneath that to be hidden, but it did not.

Is that just not implemented yet, or am I just not understanding the feature correctly?