If by accident a table is readonly (only GRANT SELECT) an exception is generated when pressing 'update' in the 'Edit XXX' screen. When using a scaffolded controller (scaffold = true), this exception is logged, but then it disappears. The user sees nothing, only the screen that pops up after doing the update. I would expect some kind of indication on the screen that something has gone horribly wrong. Could be just a stacktrace. I think this exception should propogate, not be swallowed, because it is an exceptional situation that should be presented to the user immediately.