A significant production problem with new high-tech $100 bills has caused government printers to shut down production of the new notes and to quarantine more than one billion of the bills in huge vaults in Fort Worth, Texas and Washington, DC, CNBC has learned. Initially scheduled for release in February of 2011, the new bills were announced with great fanfare by officials at the Treasury Department and the Federal Reserve in April. At the time, officials announced the new bills would incorporate sophisticated high-tech security features, including a 3-D security strip and a color-shifting image of a bell designed to...