Thank you for asking.

The summary: MediaBox doesn't find all of my pictures and it doesn't display correctly all those it does find.

The pictures are in MyDocs/Pictures:
MyDocs/Pictures/20090107-Matney&MatneyBirthday
MyDocs/Pictures/20091219-Snowpocalypse
MyDocs/Pictures/20091220-Snowpocalypse
MyDocs/Pictures/20100116-Matney&MatneyBirthday
MyDocs/Pictures/BostonXmas2009
MyDocs/Pictures/Katie's Camera
MyDocs/Pictures/Katie's Memorial Slide Show
MyDocs/Pictures/Panos
MyDocs/Pictures/Vacation2009
MyDocs/Pictures/Vacation2009/05-Greg_Melissa
MyDocs/Pictures/Vacation2009/05-Phyllis

There are cover art pictures in MyDocs/Music/*/ also.

MediaBox shows me the directories with cover art. Each has a single file and MediaBox displays those pictures without fail.

MediaBox shows me only three of the Pictures subdirectories: 05-Greg_Melissa, 20090107-Matney&MatneyBirthday, and 20091219-Snowpocalypse. There should be 300 pictures in 05-Greg_Melissa. MediaBox shows me 19. There should be 31 pictures in 20090107-Matney&MatneyBirthday. MediaBox shows 2 and neither of them have any useful content. In fact, MediaBox shows the previously displayed picture when I select one of them. E.g. If I previously looked at the cover art for BB King's "Completely Well" CD, MediaBox shows me that picture again if I choose one of the pictures in 20090107-Matney&MatneyBirthday.

All told, I have about 1800 pictures, including album cover art. MediaBox finds about 200 of them.