I use a workbook for scheduling production. When I save and then send it,
certain recipients' workbook no longer shows numbers in the cells, but
instead has a wierd font I'll call rock/paper/scissors. The fonts are not
numbers but symbols that include scissors, hands, and other things. If the
cursur is on the cell, the actual number is in the little box at the top, but
the pictures are in the cells.
I've had the people email them back to me, but when I open them up,
everything is normal.

I've emailed the book to three different personal email accounts I have, and
used two different PCs, one XP Pro, and one old laptop with ME on it, and the
workbooks are fine on either computer.

The problem users all have XP Pro. They are not only internal to this
company, but our customers as well. But not everybody's computer exhibits
this issue.

I've been using Excel for, well, ever. I've never had this problem before.
How can I fix this?

Thank you!
Fred