iPhoto 9.6 - slideshow to movie - text slides show only text and no image

Made slideshow in iPhoto 9.6. Runs fine in slideshow mode on my iMac. However, when I export it to my desktop as a movie, slides that I inserted text via the text slide feature (bottom right of iPhoto) - black with the text only - lost the image. This happens on most of the text slides. followed similar procedure before w/ no issues.