--- a/acl.pm	Tue Dec 13 14:02:11 2011 +0100
+++ b/acl.pm	Tue Dec 13 21:45:06 2011 +0100
@@ -87,6 +87,8 @@
     die "IMAP Server does not advertise acl support"
       unless $imap->capability->{acl};
 
+    $imap->set_tracing(1) if $ENV{TRACE};
+
     # requires an imap connection
     my $ns = $imap->namespace() or die "No public namespaces available: $@";
     $nspat = [];
@@ -149,7 +151,8 @@
               or die "Can't create folder '$folder': $@"
               if $Cf->create;
 
-            for my $f ( @{ acl_folders($folder) } ) {
+            my @folders = @{ acl_folders($folder) } or die "Got empty folderlist - does '$folder' exist? (use --create if you want me to create it)";
+            for my $f ( @folders ) {
 
                 if ( $Cf->acl eq 'delete' ) {
                     $imap->deleteacl( $f, $user ) or die "Can't delete acl: $@";
@@ -360,8 +363,8 @@
         while ( $u = shift @{$perms} and $p = shift @{$perms} ) {
 
             # '#user' will be listed when we have a global acl for 'user'
-            my $gl = $u =~ /^#/  ? ' [global acl]' : '';
-            my $gr = $u =~ /^\$/ ? ' [group acl]'  : '';
+            my $gl = $u =~ /^\$?#/  ? ' [global]' : '';
+            my $gr = $u =~ /^#?\$/ ? ' [group]'  : '';
             $hasacl = 1;
             print "\t$u [$p]$gr$gl\n";
         }