Is anyone out there aware of problems with the TDBCtrlGrid component
when used in a multi-user environment?

I've just completed an application for a client and delivered it
yesterday. When they were adding records to a table via a DBCtrlGrid
component, the application performs an "...illegal operation..." and
shuts down.

Is it a bad idea to use this component? Is it flakey? I can't find any
help or criticisms on this object.