The online stock trading and investment company TD Ameritrade announced this morning that a database server holding contact information for approximately 6.3 million customers was cracked and copied by agents unknown. They're saying that the Social Security and account numbers in the database weren't copied, but it sounds kind of odd that crackers would only take names, addresses, and e-mail addresses and leave the good stuff behind. Because the FBI, SEC (Securities Exchange Commission), and FIRA (FInancial Industry Regulatory Authority) are involved they're not allowed to release any more information pertinent to the case. The compromise appears to have …