Rumor has it Sony rummages around in these threads.
This thread is to report "internal" bugs to Sony (since they haven't provided a mechanism I'm aware of.)
My first internal bug.
When issuing a Directory Read Command via USB to the Sony Reader (you see why I call these internal errors) if you provide an invalid handle e.g. not what was returned from a Directory Open Command, the Reader panics (does a reboot).
Example, I was issued handle 0x00138418 but I handed back 0xffff8418.