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--- a/Allura/allura/lib/markdown_extensions.py
+++ b/Allura/allura/lib/markdown_extensions.py
@@ -33,6 +33,8 @@
 
     def extendMarkdown(self, md, md_globals):
         md.registerExtension(self)
+        # allow markdown within e.g. <div markdown>...</div>  More info at: https://github.com/waylan/Python-Markdown/issues/52
+        md.preprocessors['html_block'].markdown_in_raw = True
         md.preprocessors['fenced-code'] = FencedCodeProcessor()
         md.preprocessors.add('plain_text_block', PlainTextPreprocessor(md), "_begin")
         md.inlinePatterns['autolink_1'] = AutolinkPattern(r'(http(?:s?)://[a-zA-Z0-9./\-_0%?&=+#;~:]+)')
@@ -104,9 +106,18 @@
         if shortlink:
             href = shortlink.url
             self.ext.forge_link_tree_processor.alinks.append(shortlink)
-        elif self.ext._use_wiki and ':' not in link:
+        elif self.ext._use_wiki and is_link_with_brackets:
             href = h.urlquote(link)
             classes += ' notfound'
+        attach_link = link.split('/attachment/')
+        if len(attach_link) == 2 and self.ext._use_wiki:
+            shortlink = M.Shortlink.lookup(attach_link[0])
+            if shortlink:
+                attach_status = ' notfound'
+                for attach in shortlink.ref.artifact.attachments:
+                    if attach.filename == attach_link[1]:
+                        attach_status = ''
+                classes += attach_status
         return href, classes