The attached .tgd doesn't seem to have a cloud layer, so I can't even attempt to reproduce this. I see the reason the file is so big is due to the *42* separate copies of a bird model, so that at least is explained. I still don't think it's necessarily the reason for the crash, although depending on how each object is loaded it may be a memory issue. If you can provide a similarly compressed .tgd that does include the cloud layer causing the crash I'll check again and see if I can reproduce this.
- Oshyan