Salvador Scofano and Gry Midttun wrote:
Your suggestion solved the problem. After enabling the custom shortcuts, I went to the Word's customize feature.
Thhen -> keyboard -> Category and added an alternative shortcut for the macro correspondent to Next Segment.
Strange: over here, making the changes in Wordfast was sufficient, I didn't have to make changes in Word. I tested that in Word 2010, btw. Anyway, I'm happy with the default Wordfast shortcuts, so I'm not using custom shortcuts at all.