patch-src::MIME_BASE64_NO_NAME-3.1.0.patch by Victor Ustugov <corvax+spamassassin@mta.org.ua>

diff -urN lib.orig/Mail/SpamAssassin/EvalTests.pm lib/Mail/SpamAssassin/EvalTests.pm
--- lib.orig/Mail/SpamAssassin/EvalTests.pm	2006-01-18 15:14:18.000000000 +0200
+++ lib/Mail/SpamAssassin/EvalTests.pm	2006-01-18 15:17:25.000000000 +0200
@@ -2238,7 +2238,7 @@
     $self->{mime_base64_encoded_text} = 1;
   }
 
-  if ($cte =~ /base64/ && !$name) {
+  if ($cte =~ /base64/ && !$name && $ctype !~ /text/) {
     $self->{mime_base64_no_name} = 1;
   }