Back in August, folks with a MacBook Pro and Verizon's V640 ExpressCard started to notice issues using the Cisco VPN Client. Many of them discussed their dismay on this EVDO FORUMS thread. A Cisco employee reported that the bug was found and fixed in early September, and yet the official release of the update just occured October 23rd.
Though it took over two months to get the fix out the door... all is well. Users of the MacBook Pro and the V640 can relax. Early reports are that the update has in fact fixed the issue with PPP connections.