Hi,

- please open a writer document

- insert a table (1 row and 2 columns is enough)

- insert something into one of these two cells, for example the number "5"

- place the cursor in the second (empty) cell

- enter "="

- click into the cell with the number "5"

- press RETURN: Now the "5" is copied to the second cell, as expected.

- click UNDO: Note that only the alignment (right) is undone, but the "5" remains.

If clicking undo more times, the "5" of the first cell is removed, but the one
of the second cell (the formula "5") is not removed. It only is removed if undo
is clicked even more times to undo inserting of the table.

(Found on SO8 PU8 Linux and OOo 2.3 windows.)