Six days since the end of my project (tgf.fm/ks), 15 of my 1044 backers haven't gone through. I think a bunch have fixed credit card errors over the last week. Three of the nine biggest pledges had their cards declined, likely because of the giant charge to an unfamiliar vendor—but those folks have been in touch directly to resolve the issue.
Wish they showed you here: <a href="https://www.kickstarter.com/help/stats" rel="nofollow">https://www.kickstarter.com/help/stats</a>