open my $savederr, '>&', \*STDERR;
my $module_stderr = '';
open(STDERR, '>', \$module_stderr);
SomeFunkyModule::sub_that_spews_to_stderr();
open(STDERR, '>&', $savederr);
# process the stuff in $module_stderr


##</code><code>##

@/=map{[/./g]}qw/.h_nJ Xapou cets krht ele_ r_ra/;
map{y/X_/\n /;print}map{pop@$_}@/for@/