Yahoo Finance changed their API for downloading historic data, breaking a lot of existing scripts and modules, and making a lot of people sad.
This program allows historic data to be retrieved again. (Its a work in progress at the moment, so please, no comments about the lousy code quality)
Only works on Windows
YahooFinanceHistoricData.exe <symbol> <name>
eg
YahooFinanceHistoricData.exe MSFT Microsoft