Hi rubberduck!
I downloaded and tried opening the the track, but Blender seemed to have difficulty finding a lot of the image textures.
Looking at the "Datablock" mode of the outliner, this seems to be an issue with the way the paths for the images files are stored. For example, the image "bee_obj" is stored using an absolute url (/home/sintel/stk_media_repo/tracks/beehive/bee_tex.png). Some other images, like "speedy", are stored using relative paths that point to places outside the media repository (//../../../Desktop/beehive_track/track_source/speedy.png). There's also at least one image, called "bee", that's not even set to use a file as the source (it's set to "Generated").
You could run [File]->[External Data]->[Make All Paths Relative], and then manually change the paths for any files outside the media repo to fix this. That takes a while to do though, and it's hard to know whether or not it will work until it gets tested on another computer. The fastest fix would be to simply pack all files and reupload, but that would create more work for anyone who wants to merge the track into the media repository, while greatly increasing download size.
Overall, the modeling looks pretty solid. There's not much else to look at without textures though