I a text document of some length, insert a table of any size.

If you are in the lover-right hand cell, and press tab, you get a new row. But
when pressing ctrl+z to undo making the new row, the cursor ends up in the start
of the document!

That is, the cursor does not remain below the table, but is moved to the very
top of the text document.

Pressing undo on the graphic menu in the top of the Open Office Writer window
makes the same thing happen.