I have the same problem, when I activate "wrap text", the text doesn't get
displayed, it is there but no matter the letter size or cell size, I can't
see it.

If I change the text orientation to a degree other than 0° and 90°, all the
letters appear one over the other on the upper left corner. I have tried
"Help\detect and repair", reinstall from the "control panel\add remove
programs" and turning the PC off and on, after a while it goes back to work
normally, but I haven't been able to identify which of the things or order of
performing them makes it work, but it's annoying.

If anyone can help with this I'll be forever thankful

Esteban