1. Set Helvetica as primary font; 2. removed tabs

app/assets/stylesheets/style.scss

@@ -670,3 +670,13 @@ body.projects-page .browse-code{margin-right: 10px}
   p, h2, h3 { orphans: 3; widows: 3; }
   h2, h3 { page-break-after: avoid; }
 }
+
+/**
+ * author:DZ
+ * date: Nov 09
+ * fix different fonts for firefox & webkit
+ */
+body, button, input, select, textarea {
+  font-family: "Helvetica", sans-serif;
+}
+

app/helpers/issues_helper.rb

 module IssuesHelper
-	def sort_class
-		if can?(current_user, :admin_issue, @project) && (!params[:f] || params[:f] == "0")
-			"handle"
-		end
-	end
-	
-	def project_issues_filter_path project, params = {}
-		params[:f] ||= cookies['issue_filter']
-		project_issues_path project, params
-	end
+  def sort_class
+    if can?(current_user, :admin_issue, @project) && (!params[:f] || params[:f] == "0")
+                        "handle"
+    end
+  end
+
+  def project_issues_filter_path project, params = {}
+    params[:f] ||= cookies['issue_filter']
+    project_issues_path project, params
+  end
 end

app/helpers/tags_helper.rb

 module TagsHelper
-	def tag_path tag
-		"/tags/#{tag}"
-	end
+  def tag_path tag
+    "/tags/#{tag}"
+  end
 
-	def tag_list project
-		html = ''
-		project.tag_list.each do |tag|
-			html += link_to tag, tag_path(tag)
-		end
-		
-		html.html_safe
-	end
+  def tag_list project
+    html = ''
+    project.tag_list.each do |tag|
+      html += link_to tag, tag_path(tag)
+    end
 
+    html.html_safe
+  end
 end