USB: Media Sector Size = 0 bytes

Not sure if this is an RZ issue, but I thought I'd start here...

I'm experimenting with the USB Host Sample 2 from the RZ/A1 Framework V1.03 (app note R01AN3638EJ0103) on the RSK board.  It seems to work as expected with one of my USB thumb drives, but a different drive reports a Media Sector Size of 0 bytes (instead of the normal 512).  Both drives work OK on my Windows machine.

Also, with the "bad" drive plugged in, the call to ioif_read() doesn't return.

Does this sound familiar?  Smells like a bug in the Renesas USB driver code.

Thanks.