I have been suspecting that, too. Not only for spam, but also if the author deletes the entry. Not in this case, though, as there was a new post on page 17, 800+ posts down the list. I wish they wouldn't count purged posts as new, but not knowing anything about the underlaying data structure, I'd accept a claim from the developers / maintainers that it would require significantly more processing for the 99,99% of the requests when there is no purged entries. I guess you could add a 'purged' flag to the data records search for flagging the forum, and skip those entries. Often, modifications to a data structure - even as small as adding a flag - could have consequences far beyond what you first would expect. E.g. you must ensure that the flag is always set when appropriate; that could affect several modules. The information is already stored somewhere; making another copy of the same info is bad database practice; it should be normalized. ...And so on. If the maintainers claim similar problems in using the 'New posts exist' information (causing the orange bullet) to tag another element in the user interface, based on the identity of the new post(s), I'd sure like to see an explanation of why it is 'undoable' or requires an extraordinate amount of processing power.