I also think that the continuous submission of the same new from different sources is a problem. (But I usually only post a “previous discussion” when one of the old versions have a lot of comments, or a very interesting comment.)

Most of them are only a rehash of the original new, without any additional information. Sometimes it’s worst, and every rehash lost a part of the information and add some hype. The guidelines advice to submit the original version.

The problem is that a lot of interesting technical new are only submitted once, and they are lost in the infinite streaming of almost-dupes.

In the last days I saw a few: “Earthlike planet”, “Fuelband”, “Codebabes”, “Atari ET”

Make it harder to post a submission perhaps? I would limit the rate for frequent submitters.