Index: lib/sup/modes/thread-index-mode.rb
===================================================================
--- lib/sup/modes/thread-index-mode.rb	(revision 665)
+++ lib/sup/modes/thread-index-mode.rb	(working copy)
@@ -34,6 +34,7 @@
     @load_thread_opts = load_thread_opts
     @hidden_labels = hidden_labels + LabelManager::HIDDEN_RESERVED_LABELS
     @date_width = DATE_WIDTH
+    @unread_size_width = nil
     @size_width = nil
     
     @tags = Tagger.new self
@@ -136,6 +137,7 @@
     ## let's see you do THIS in python
     @threads = @ts.threads.select { |t| !@hidden_threads[t] }.sort_by { |t| t.date }.reverse
     @size_width = (@threads.max_of { |t| t.size } || 0).num_digits
+    @unread_size_width = (@threads.max_of { |t| t.unread_size} || 0).num_digits
     regen_text
   end
 
@@ -551,7 +553,8 @@
     ] +
       from +
       [
-      [subj_color, t.size == 1 ? " " * (@size_width + 2) : sprintf("(%#{@size_width}d)", t.size)],
+      #[subj_color, t.size == 1 ? " " * (@size_width + 2) : sprintf("(%#{@size_width}d)", t.size)],
+      [subj_color, sprintf("(%#{@unread_size_width}d/%#{@size_width}d)", t.unread_size, t.size)],
       [:to_me_color, dp ? " >" : (p ? ' +' : "  ")],
       [subj_color, t.subj + (t.subj.empty? ? "" : " ")],
     ] +
Index: lib/sup/thread.rb
===================================================================
--- lib/sup/thread.rb	(revision 665)
+++ lib/sup/thread.rb	(working copy)
@@ -118,6 +118,9 @@
   end
 
   def size; map { |m, *o| m ? 1 : 0 }.sum; end
+
+  def unread_size; map { |m, *o| m && m.has_label?(:unread) ? 1 : 0 }.sum; end
+
   def subj; argfind { |m, *o| m && m.subj }; end
   def labels
       map { |m, *o| m && m.labels }.flatten.compact.uniq.sort_by { |t| t.to_s }