Minify version: 2.1.1
PHP version: any

Lines containing /* in a string will cause following lines to be commented
out in debug mode.  For example:

var example = '*/*';
alert( 'this line will be commented out in debug mode' );

What steps will reproduce the problem?
1. Download the latest version of Prototype.js (1.6)
2. Add it to a page as part of a group with &debug=true
3. Look at line 1257.  See that that line has been commented out.