Pictures will not show up in Storybook mode

[DJ Herself]

Okay, here's the deal: I recently moved a family from Pleasantview into a lot into the Downtown area there. I have taken many pictures of the family since. However, when I go to add those pictures to the storybook, nothing shows up. I have tried going into a different lot in Downtown; again, nothing shows up. I have tried going into a lot in the actual Pleasantview; nothing shows up.

I have also checked the neighborhood storytelling folder to ensure that they're there, which they are. The pictures are in the folder, but they're not showing up in the storybook mode. Could someone give me any idea as to what could be causing this?

[simsample]

The storytelling uses an XML file to structure the story- you could use this program to edit this:
http://www.modthesims2.com/showthread.php?t=45345
Why they don't show up I have no idea- I've always found this to be glitchy myself, especially regarding Uni campus pictures and Downtown images.

[DJ Herself]

I do have that program. In fact, that's the first place that I discovered that I had a problem. When I open a lot that has one picture in it and try to add more of the pictures (Snapshot Browser), all I get is an 'Invalid Thumbnail' message so I can't see what the pictures look like. However, at least I can add them to the storybook (I assume). I'll try renaming the pictures to make it easier to find what I'm looking for.

ETA: It seems that renaming the pictures automatically makes them unavailable for use. Shame, really.