All lower-case letters showing as capital letters.

Hi,

Suddenly, any text I type in PSE 10 shows up in all capital letters and I don't know how to fix it.

For instance:

In the layer, it shows:  I went to Mary's house.

In the document, it shows:  I WENT TO MARY'S HOUSE.

I've reset the fonts and that didn't help.  Any suggestions?

Thanks!