[Antek]

What I described earlier happened when I used
Format - Borders & Shadings etc.
However when I used the icon from the bar
everything went OK.

Thanks for your advice.

Regards
Antek

I have applied a bottom border and a table border.
If it helps (sometimes), it helps for a moment.
After saving the file and reopening it the problem
occurs again.
What is more, it changes what cells it concerns,
but it always concerns bottom lines of the last row
in a table.

Have you applied a Bottom border to those cells?

I have a few small tables in my Word97 file.
Some of cells in a last row of some tables
look like "open", they do not have a bottom line.
I can't get rid of it. They are "open" on display
and when I print the file.