diff --git a/lib/flowerbox.rb b/lib/flowerbox.rb
index 8c9caa2..fcd2294 100644
--- a/lib/flowerbox.rb
+++ b/lib/flowerbox.rb
@@ -21,7 +21,7 @@ module Flowerbox
     require 'flowerbox/rails/engine'
   end
 
-  CACHE_DIR = '.tmp-sprockets'
+  CACHE_DIR = 'tmp/sprockets'
 
   class << self
     attr_writer :reporters
@@ -115,6 +115,10 @@ module Flowerbox
         break if env.transplant(dir)
       end
     end
+
+    def cache_dir
+      File.join(CACHE_DIR, Flowerbox.test_environment.name)
+    end
   end
 end
 
diff --git a/lib/flowerbox/reporter/console_base.rb b/lib/flowerbox/reporter/console_base.rb
index 7d1fdbe..de167d9 100644
--- a/lib/flowerbox/reporter/console_base.rb
+++ b/lib/flowerbox/reporter/console_base.rb
@@ -20,7 +20,7 @@ module Flowerbox::Reporter
       puts result.name.join(" - ").foreground(:red)
       result.failures.each do |failure|
         puts "  " + failure.message.foreground(:red) + " [" + failure.runners.join(',') + "] " + path_for(failure)
-        puts failure.stack.join("\n").foreground(:red) if failure.exception?
+        puts failure.filtered_stack.join("\n").foreground(:red) if failure.exception?
       end
     end
 
diff --git a/lib/flowerbox/reporter/verbose.rb b/lib/flowerbox/reporter/verbose.rb
index 6cf2b32..02f8e71 100644
--- a/lib/flowerbox/reporter/verbose.rb
+++ b/lib/flowerbox/reporter/verbose.rb
@@ -12,6 +12,8 @@ module Flowerbox::Reporter
       if result.name
         result.name.each_with_index do |name, index|
           if @name_stack[index] != name
+            @name_stack = []
+
             if name != result.name.last
               message = name
             else
diff --git a/lib/flowerbox/result/failure_message.rb b/lib/flowerbox/result/failure_message.rb
index 6dc5c2a..d5ba474 100644
--- a/lib/flowerbox/result/failure_message.rb
+++ b/lib/flowerbox/result/failure_message.rb
@@ -34,6 +34,14 @@ module Flowerbox::Result
       @data['stack'] || []
     end
 
+    def filtered_stack
+      stack.collect do |line|
+        line.gsub(%r{\.coffee:(\d+)}) do |_|
+          ".coffee:~#{($1.to_i * 0.67 + 1).to_i}"
+        end
+      end
+    end
+
     def first_local_stack
       @first_local_stack ||= stack[1..-1].find do |line|
         !system_files.any? { |file| line[%r{\(#{file}}] }
diff --git a/lib/flowerbox/runner/base.rb b/lib/flowerbox/runner/base.rb
index 4ccedfc..e63ee9d 100644
--- a/lib/flowerbox/runner/base.rb
+++ b/lib/flowerbox/runner/base.rb
@@ -57,7 +57,20 @@ module Flowerbox
 
           puts "Flowerbox running your #{Flowerbox.test_environment.name} tests on #{console_name}..."
 
-          server.start
+          attempts = 3
+
+          while true
+            begin
+              server.start
+
+              break
+            rescue Flowerbox::Server::ServerDiedError
+              attempts -= 1
+              raise RunnerDiedError.new if attempts == 0
+
+              Flowerbox.server = nil
+            end
+          end
 
           yield
 
diff --git a/lib/flowerbox/server.rb b/lib/flowerbox/server.rb
index 2e64e27..7ed22af 100644
--- a/lib/flowerbox/server.rb
+++ b/lib/flowerbox/server.rb
@@ -8,6 +8,8 @@ module Flowerbox
   class Server
     attr_reader :options
 
+    class ServerDiedError < StandardError ; end
+
     def initialize(options = {})
       @options = { :logging => false }.merge(options || {})
     end
@@ -39,7 +41,7 @@ module Flowerbox
         sleep 0.1
       end
 
-      raise StandardError.new("Server died") if !@server_thread[:server].running?
+      raise ServerDiedError.new if !@server_thread[:server].running?
     end
 
     def stop
diff --git a/lib/flowerbox/sprockets_handler.rb b/lib/flowerbox/sprockets_handler.rb
index a0bb219..a716f10 100644
--- a/lib/flowerbox/sprockets_handler.rb
+++ b/lib/flowerbox/sprockets_handler.rb
@@ -39,7 +39,7 @@ module Flowerbox
       return @environment if @environment
 
       @environment = Sprockets::Environment.new
-      @environment.cache = Sprockets::Cache::FileStore.new(Flowerbox::CACHE_DIR)
+      @environment.cache = Sprockets::Cache::FileStore.new(Flowerbox.cache_dir)
 
       self.class.gem_asset_paths.each { |path| append_path(path) }
       options[:asset_paths].each { |path| append_path(path) }