I have a table in Word in which text which had been wrapping suddenly stops doing so, but only in one or two cells, usually those at the bottom of the table. I have already checked the following without success:

1) "wrap text" is checked
2) There are no negative indents, and all indentation is set to zero
3) I have done a formatting copy-paste from a wrapped cell (no change)

This is in Mac Word 2011; when we opened the same file on a PC, there was no wrapping problem.