How to disable auto-complete in tables?

Neither in the Preferences, nor the "Edit"-menu, or even the "Table"-tab in the "Inspector" can I find a way to disable the auto-completion in tables [that automatically inserts the content from other table cells when I start typing].

The auto-completion is driving me nuts: I want to write the new cell content, and "tab" to the next cell, but I can't, because the auto-completion leaves something else than what I wrote in the cell when I tab out of it.

So how do I get rid of this mis-feature?