Sansa Firmware Thread

How do I know which version my Sansa e270 is?

Version Info: Product Rev.: PP5022AF-05.51-S301-02.24-S301.02.24A-D
Base Code: 05.51-S301-02.24-S301.02.24A-D
ODM Ver.: S301-02.24-S301.02.24A-D
OEM Ver.: S301.02.24A-D
Build Type: -D
Build Date: 2007.12.24
Build Number: (Build 32.10)

What does this signify?