Add date/time to forum threads?
Personally I'd quite like to see these on the main list - just helps to remind me what's new since I last popped in.
The feature you want already sort-of exists. The URL presented for each thread changes if there have been any additions to the thread, so it will no longer appear to be a "visited" URL in your browser.
The problem with that is that I don't always read from the same PC - so "visited" threads aren't remembered.
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