Possible new class of bugs

[Joel Peshkin]

Gervase Markham wrote:

> TT treats hash keys beginning with "_" or "." as private, and 
> templates can't access them:
> <snip>
>
> Anyone with a moment to spare could perhaps start defining lots of 
> things (products, components etc.) that begin with those two chars and 
> see what breaks...


Perhaps we should just validate products and components so thay have to 
start with [A-Za-z0-9]  ??