If you have time to review the posting history - then try reviewing that user's posting habits. There are two old topics that he deliberately bumped after being submerged for more than 7 months - if you are sharp enough to pay attention to them, then you will definitely know what his motives are.

I then wondered - is this topic still relevant to maintain after 7 months of being drowned out by dozens or hundreds of other topics?
If someone else notices that - I hope they give me the answer, but I know it's relevant to bump some old topic if there's something really constructive to discuss further.