It's hard to believe that a bug in a popular CPAN module can be considered "low priority" and not fixed since 2005, when this bug destroys and renders inconsistent Perl's simple mechanism for recording module installation history. Without perllocal you have to traverse @INC and stat every module file to figure out when they were installed. If a module was edited or something then it becomes very difficult to impossible to tell when it was installed. Is this information stored anywhere else, does the cpan utility keep track of what it has done?