tedster - 12:41 am on Aug 5, 2010 (gmt 0)
This big data dump of links into WMT is pretty new - just a couple weeks or so. So there's a not a lot of history for us to draw on, but I haven't heard of any penalties or ranking losses.
I think it's just raw link data. It's a common spammer/scraper thing to dynamically change what links appear on pages - so sometimes googlebot sees links to your site that aren't there just a short while later.