Fixed the Content-negotiation for sending XHTML.

Fixed a non-well-formed page.
Maruku's metadata processing seems to be busted. May have to revert.

app/controllers/application.rb

@@ -148,7 +148,7 @@ class ApplicationController < ActionController::Base
       @response.headers['Content-Type'] = 'text/xml; charset=UTF-8'
     elsif %w(tex).include?(action_name)
       @response.headers['Content-Type'] = 'text/plain; charset=UTF-8'
-    elsif Mime::Type.parse(@request.env["HTTP_ACCEPT"]).include?(Mime::XHTML) or @request.env["USER_AGENT"] =~ /MathPlayer/
+    elsif @request.env['HTTP_USER_AGENT'] =~ /MathPlayer|Validator/ or Mime::Type.parse(@request.env["HTTP_ACCEPT"]).include?(Mime::XHTML)
       @response.headers['Content-Type'] = 'application/xhtml+xml; charset=UTF-8'
     else
       @response.headers['Content-Type'] = 'text/html; charset=UTF-8'
@@ -202,6 +202,7 @@ module Mime
   # Add XHTML
   XHTML  = Type.new "application/xhtml+xml", :xhtml
   
-  # Fix xhtml lookup
+  # Fix xhtml and html lookups
+  LOOKUP["text/html"]             = HTML
   LOOKUP["application/xhtml+xml"] = XHTML
 end

app/views/wiki/web_list.rhtml

@@ -1,11 +1,11 @@
 <% @title = "Wiki webs" %>
-<br/>
 
+<ul>
 <% @webs.each do |web| %>
   
+<li>
 	<% if web.password %> <div class="web_protected">
 	<% else %> <div class="web_normal"> <% end %>
-	<span>
 	<%= link_to_page 'HomePage', web, web.name, :mode => 'show' %>
     <% if web.published? %>
      (<%= link_to_page 'HomePage', web, 'published version', :mode => 'publish' %>)
@@ -19,7 +19,7 @@
 			<%= web.last_page.revisions? ? "Revised" : "Created" %> by <%= author_link(web.last_page) %> (<%= web.last_page.current_revision.ip %>)
 		<% end %>
     </div>
-  </span>
-  </div><br>
+  </div>
+</li>
 <% end %>
 </ul>