--- a/isearch	Thu Nov 03 16:08:48 2011 +0100
+++ b/isearch	Wed Nov 09 10:40:03 2011 +0100
@@ -86,8 +86,21 @@
 for (@{$f}) {
 
     print "Examining $_ ...\n";
-    $imap->examine($_)
-      or die "Can't examine: " . $imap->LastError . "\n";
+    unless ($imap->examine($_)) {
+
+        my $e = $imap->LastError;
+        # skip folder with invalid name
+        if ($e =~ /BAD Error in IMAP command EXAMINE: 8bit data in atom$/
+            or $e =~ /NO Invalid mailbox name: /) {
+            warn "Can't examine '$_': $e\n";
+            print "Skipping $_ ...\n";
+            next;
+        } else {
+            die "Can't examine '$_': $e\n";
+        }
+
+    }
+
     print "Searching $_ ...\n";
     if ( my $m = $imap->search( $opts->{criteria} )) {
         $mids->{$_} = $m;
@@ -100,11 +113,12 @@
         # 2011-11-02 14:59:13 IMAP(userid): Error: Raw backtrace: imap [0x80f2fd1] -> imap [0x80f3052] -> imap [0x80f29a9] -> /usr/lib/dovecot/modules/imap/lib21_fts_squat_plugin.so [0xb744a50d] -> /usr/lib/dovecot/modules/imap/lib21_fts_squat_plugin.so(squat_trie_build_more+0x151) [0xb744a7a1] -> /usr/lib/dovecot/modules/imap/lib21_fts_squat_plugin.so [0xb7447a54] -> /usr/lib/dovecot/modules/imap/lib20_fts_plugin.so(fts_backend_build_more+0x2e) [0xb7453e7e] -> /usr/lib/dovecot/modules/imap/lib20_fts_plugin.so [0xb7456fb6] -> imap(mailbox_search_next_nonblock+0x2d) [0x80b6e7d] -> imap [0x806e221] -> imap(imap_search_start+0x150) [0x806e700] -> imap(cmd_search+0xff) [0x8064d2f] -> imap [0x8067c6c] -> imap [0x8067d09] -> imap(client_handle_input+0x2d) [0x8067e7d] -> imap(client_input+0x5f) [0x80687df] -> imap(io_loop_handler_run+0xe0) [0x80fbd80] -> imap(io_loop_run+0x20) [0x80fb1f0] -> imap(main+0x5ea) [0x80713ba] -> /lib/i686/cmov/libc.so.6(__libc_start_main+0xe5) [0xb75f1455] -> imap [0x8060351]
         # 2011-11-02 14:59:13 dovecot: Error: child 7559 (imap) killed with signal 6 (core dumps disabled)
         if ($e eq 'socket closed while reading data from server') {
+            warn "Can't search '$_': $e\n";
             $imap->connect
                 or die "Could not connect to IMAP server: $@\n";
         } else {
 
-            die "Can't search: $e\n";
+            die "Can't search '$_': $e\n";
 
         }
     }
@@ -112,20 +126,20 @@
 }
 
 my @headers = qw(subject from to cc bcc date);
-for ( sort keys %{$mids} ) {
+for my $f ( sort keys %{$mids} ) {
 
-    my $m = $mids->{$_};
+    my $m = $mids->{$f};
 
     if ( @{$m} ) {
 
-        $imap->examine($_)
+        $imap->examine($f)
           or die "Can't examine: " . $imap->LastError . "\n";
-        my $h = $imap->parse_headers( $mids->{$_}, @headers )
+        my $h = $imap->parse_headers( $mids->{$f}, @headers )
           or die "Can't get summaries: " . $imap->LastError . "\n";
 
         for my $id ( keys %{$h} ) {
 
-            print "\n[$id]\n";
+            print "\n[$f] [$id]\n";
             for my $hn (@headers) {
                 print ucfirst $hn . ": $_\n" for @{$h->{$id}->{$hn}};
             }