Same here, telling me its a Malware and blocking it until I turn off the File Shield. There is no file in the chest, but this is the log file.
05/10/2010 19:37:04 C:\ProgramData\Blizzard Entertainment\Battle.net\Cache\24\e0\24e0dab53762d83c513db9897ebb8fccf7cc7bf83079d47de361f72646196792.auth|>[UPX] [L] Win32:Malware-gen (0)
While moving file to chest, error occurred: Virus chest server is not running. RPC communication failed.
During the file delete, error occurred: The system cannot find the file specified