[plt-scheme] modifying preferences from a collection .plt

On Aug 20, 2007, at 20:59 , Robby Findler wrote:

> Try (require (lib "preferences.ss" "framework")) instead.

I'd tried that earlier.  That gives me a different error during setup- 
plt:

setup-plt: Post-Installing PLAI
preferences:get: tried to get a preference but no default set for  
framework:tabify

  === context ===
/Applications/PLT/collects/framework/preferences.ss:170:2: raise- 
unknown-preference-error
preferences:get
/Users/arjun/Library/PLT Scheme/371/collects/plai/private/post- 
installer.ss:18:4: post-installer

Arjun