From: ts Date: 2003-01-10T23:17:35+09:00 Subject: Re: Security problems >>>>> "T" == Tim Bates writes: T> b.rb:12: Insecure: can't modify string (SecurityError) You have found : internally ruby use a method (rb_str_cat), when it will register the new class, which give this error. This is modified in 1.8.0 Guy Decoux