Issue #4549 has been updated by Yui NARUSE. Status changed from Open to Rejected It is because ?? is not a uppercase letter. ---------------------------------------- Bug #4549: Can't start class names with non us-ascii chars http://redmine.ruby-lang.org/issues/4549 Author: Carl Hörberg Status: Rejected Priority: Normal Assignee: Category: Target version: ruby -v: ruby 1.9.2p180 (2011-02-18) [i386-cygwin] irb(main):003:0> #encoding: UTF-8 irb(main):004:0* class ??äö; end SyntaxError: (irb):4: class/module name must be CONSTANT class ??äö; end ^ from /usr/local/bin/irb:12:in `<main>' -- http://redmine.ruby-lang.org