diff --git a/app/models/notice.rb b/app/models/notice.rb
index 0d4b837..7e9dc8a 100644
--- a/app/models/notice.rb
+++ b/app/models/notice.rb
@@ -107,6 +107,8 @@ class Notice
     [:server_environment, :request, :notifier].each do |h|
       send("#{h}=",sanitize_hash(send(h)))
     end
+    # Set unknown backtrace files
+    backtrace.each{|line| line['file'] = "[unknown source]" if line['file'].blank? }
   end
 
   def sanitize_hash(h)
diff --git a/app/views/issue_trackers/fogbugz_body.txt.erb b/app/views/issue_trackers/fogbugz_body.txt.erb
index 38f0546..d85580d 100644
--- a/app/views/issue_trackers/fogbugz_body.txt.erb
+++ b/app/views/issue_trackers/fogbugz_body.txt.erb
@@ -20,7 +20,7 @@
 
   Backtrace
   <% for line in notice.backtrace %>
-    <%= line['number'] %>:  <%= line['file'].sub(/^\[PROJECT_ROOT\]/, '') %>
+    <%= line['number'] %>:  <%= line['file'].to_s.sub(/^\[PROJECT_ROOT\]/, '') %>
   <% end %>
 
   Environment
diff --git a/app/views/issue_trackers/github_issues_body.txt.erb b/app/views/issue_trackers/github_issues_body.txt.erb
index 8b3297f..1887ca0 100644
--- a/app/views/issue_trackers/github_issues_body.txt.erb
+++ b/app/views/issue_trackers/github_issues_body.txt.erb
@@ -27,7 +27,7 @@
 
 ## Backtrace ##
 ```
-<% for line in notice.backtrace %><%= line['number'] %>:  <%= line['file'].sub(/^\[PROJECT_ROOT\]/, '') %> -> **<%= line['method'] %>**
+<% for line in notice.backtrace %><%= line['number'] %>:  <%= line['file'].to_s.sub(/^\[PROJECT_ROOT\]/, '') %> -> **<%= line['method'] %>**
 <% end %>
 ```
 
diff --git a/app/views/issue_trackers/lighthouseapp_body.txt.erb b/app/views/issue_trackers/lighthouseapp_body.txt.erb
index 709d194..00bb9d8 100644
--- a/app/views/issue_trackers/lighthouseapp_body.txt.erb
+++ b/app/views/issue_trackers/lighthouseapp_body.txt.erb
@@ -23,7 +23,7 @@
 
   ## Backtrace ##
   <code>
-  <% for line in notice.backtrace %><%= line['number'] %>:  <%= line['file'].sub(/^\[PROJECT_ROOT\]/, '') %> -> **<%= line['method'] %>**
+  <% for line in notice.backtrace %><%= line['number'] %>:  <%= line['file'].to_s.sub(/^\[PROJECT_ROOT\]/, '') %> -> **<%= line['method'] %>**
   <% end %>
   </code>
 
@@ -32,3 +32,4 @@
     <%= key %>: <%= val %>
   <% end %>
 <% end %>
+
diff --git a/app/views/issue_trackers/pivotal_body.txt.erb b/app/views/issue_trackers/pivotal_body.txt.erb
index 7a5362d..ee46752 100644
--- a/app/views/issue_trackers/pivotal_body.txt.erb
+++ b/app/views/issue_trackers/pivotal_body.txt.erb
@@ -12,5 +12,6 @@ See this exception on Errbit: <%= app_err_url err.app, err %>
     <%= pretty_hash notice.session %>
 
     Backtrace:
-    <%= notice.backtrace[0..4].map { |line| "#{line['number']}: #{line['file'].sub(/^\[PROJECT_ROOT\]/, '')} -> *#{line['method']}*" }.join "\n" %>
+    <%= notice.backtrace[0..4].map { |line| "#{line['number']}: #{line['file'].to_s.sub(/^\[PROJECT_ROOT\]/, '')} -> *#{line['method']}*" }.join "\n" %>
 <% end %>
+
diff --git a/app/views/issue_trackers/textile_body.txt.erb b/app/views/issue_trackers/textile_body.txt.erb
index 0f9ab56..99c590e 100644
--- a/app/views/issue_trackers/textile_body.txt.erb
+++ b/app/views/issue_trackers/textile_body.txt.erb
@@ -32,7 +32,7 @@ h2. Session
 h2. Backtrace
 
 | Line | File | Method |
-<% for line in notice.backtrace %>| <%= line['number'] %> | <%= line['file'].sub(/^\[PROJECT_ROOT\]/, '') %> | *<%= line['method'] %>* |
+<% for line in notice.backtrace %>| <%= line['number'] %> | <%= line['file'].to_s.sub(/^\[PROJECT_ROOT\]/, '') %> | *<%= line['method'] %>* |
 <% end %>
 
 h2. Environment
diff --git a/app/views/notices/_backtrace.html.haml b/app/views/notices/_backtrace.html.haml
index 82f689b..2f8662d 100644
--- a/app/views/notices/_backtrace.html.haml
+++ b/app/views/notices/_backtrace.html.haml
@@ -9,8 +9,7 @@
       %td
         %ul.lines
           - lines.each do |line|
-            - line['file'] = "[unknown source]" if line['file'].blank?
-            - in_app = line['file'].gsub!('[PROJECT_ROOT]','') && !line['file'].match(/^\/vendor\//)
+            - in_app = line['file'].to_s.gsub!('[PROJECT_ROOT]','') && !line['file'].to_s.match(/^\/vendor\//)
             %li{:class => (in_app ? 'in-app' : nil)}
               = line['file']
               &rarr;
--
libgit2 0.21.2