diff --git a/rhodecode/templates/changeset/changeset_range.html b/rhodecode/templates/changeset/changeset_range.html
--- a/rhodecode/templates/changeset/changeset_range.html
+++ b/rhodecode/templates/changeset/changeset_range.html
@@ -37,7 +37,7 @@
 			<table class="compare_view_commits noborder">
             %for cnt,cs in enumerate(c.cs_ranges):
                 <tr>
-                <td><div class="gravatar"><img alt="gravatar" src="${h.gravatar_url(h.email(cs.author),14)}"/></div></td>
+                <td><div class="gravatar"><img alt="gravatar" src="${h.gravatar_url(h.email_or_none(cs.author),14)}"/></div></td>
                 <td>${h.link_to('r%s:%s' % (cs.revision,h.short_id(cs.raw_id)),h.url('changeset_home',repo_name=c.repo_name,revision=cs.raw_id))}</td>
                 <td><div class="author">${h.person(cs.author)}</div></td>
                 <td><span class="tooltip" title="${h.age(cs.date)}">${cs.date}</span></td>
@@ -71,7 +71,7 @@
           <h3 style="padding-top:8px;">
           <a class="tooltip" title="${h.tooltip(cs.message)}" href="${h.url('changeset_home',repo_name=c.repo_name,revision=cs.raw_id)}">${'r%s:%s' % (cs.revision,h.short_id(cs.raw_id))}</a>
            <div class="gravatar">
-               <img alt="gravatar" src="${h.gravatar_url(h.email(cs.author),20)}"/>
+               <img alt="gravatar" src="${h.gravatar_url(h.email_or_none(cs.author),20)}"/>
            </div>
            </h3>
           ${diff_block.diff_block(c.changes[cs.raw_id])}