From my reading of the latest documents, 6th Jan is being used as the cut-off date for the company to use when dealing with banks/brokers, so if you buy after that date your bank/broker will not get the documentation in relation to the vote. Perhaps you can work around this, if you use the same broker that you've always used, I dunno, but I would be wary of buying until this is clarified. Please correct me if I am wrong (wouldn't be the first time).