jimrockford: I had the same problem with Firefox too, but managed to vote using IE6 with pop-up blocker disabled and all cookies enabled.
Update: First, thanks to all those who voted for the IB features poll request. I PMed IBj and IB Salvatore about the matter, and they both provided helpful feedback. IB Salvatore's reply: We are going to create check-boxes to get rid of MTM and FIFO information and let customers retain their statement settings. This will be available before we cut the legacy statements out. The old statements work off of old XMLs that we eventually have to sunset.