I have a project that includes some targa image sequences. Recently I moved the entire project into a different folder (keeping the structure of the project with all its subfolders completely intact). Then I did a 22 hour render.
Now I find that the targa sequences are no longer sequences. Instead they are now pointing to only the first image and ignoring all the other images. So I had to go into the project, replace all of what are now single images with the image sequences, and start the whole render again.
When I moved the project, nothing changed in the internal project folder hiearchy except that the whole thing is now under a different subfolder. Yikes!!! All the other media references were fine, only the image sequences got screwed up.