A little off-topic but still relevant. For those who want a graphic of how damaging provisional pricing has been for base metal companies like OZL, check out page 6 of this Matrix Metals presentation.
http://www.gtp.com.au/matrixmetals/inewsfiles/Chairmans%20Address%20and%20Charts.pdf
BTW, they went under due to provisional pricing, just like CopperCo. I'm sure there are others. OZL got a big hit from provisional pricing in early December.