That's bizarre. Here's what I get when I run validate on the templates in existing bento master:

```
borkbork ~/devel/gh/opscode/bento/packer (master)$ packer validate debian-6.0.8-amd64.json
Template validated successfully.
borkbork ~/devel/gh/opscode/bento/packer (master)$ packer validate debian-6.0.8-i386.json
Template validated successfully.
borkbork ~/devel/gh/opscode/bento/packer (master)$ packer --version
Packer v0.3.10
```