Free Space in System Settings > Info is Wrong

I have 8 audiobooks on a 4GB uSDHC card inserted in my Fuze. When using Windows Explorer to check Properties for the card when the Fuze is connected to my computer, I see the card has 771MB free out of a total capacity of 3955MB. Seems reasonable.

But when I disconnect the Fuze from the computer and go into System Settings > Info, I see the card has 3771MB free out of 3772MB total on the card. Info is only reporting 1MB of the uSDHC card being used.  Have I caught a bug? 

USB Mode = MSC. The audiobooks play fine on the Fuze.

Thanks for any insight.