nippi - 12:30 am on Dec 18, 2006 (gmt 0) removed duplicate names from names database.
I'm pretty sure, google will not let you out of a +30, for some change you made very recently, as then it would be giving away what causes it, however, things I have done in the last 4 months.
removed syndicated content
removed affiliate shopping cart that was a thin affiliate. not just removed the products, removed the pages.
removed heaps of links, and kept only links that were clearly good quality.
submitted a resubmission request with lots of polite cheery stuff, every 3 weeks, for 4 months, everytime i found a new problem, and fixed it.
removed duplicate names from names database.