Guile 1.8.1

From the Guile web page:

Guile is an interpreter for the Scheme programming language, with support for many SRFIs, packaged as a library which can be incorporated into your programs. Your users have full access to the interpreter, so Guile itself can be extended, based on the needs of the user. The result is a scripting language tailored to your application.

To reproduce my results on Ubuntu Gutsy Gibbon, install Guile with

sudo apt-get install guile-1.8

and create a file containing

(use-syntax (ice-9 syncase))
(read-enable 'case-insensitive)

named, say, guile-load-options.scm. Then run the interpreter with

guile -l guile-load-options.scm 2>&1

Guile makes the following choices: