When saving (moving) the Newton Works application to an external Flash card from the Extras Drawer, you get an error message when ejecting the card that "the card contains items that are in use by Newton Works. Ejecting the card could cause damage to your data". This occurs whether or not the Newton Works application is active or not.

If the card is then reinserted and ejected the message "you can now safely remove the card" appears. Removing the card, reinserting and ejecting it again will continue to reproduce the error with the same results. The data on the card is never damaged, nor is the data on the MessagePad ever damaged.