Use more specific #avatar_icon_for_email.

app/views/help/ui.html.haml

@@ -68,7 +68,7 @@
   .example
     .cover-block
       .avatar-holder
-        = image_tag avatar_icon('admin@example.com', 90), class: "avatar s90", alt: ''
+        = image_tag avatar_icon_for_email('admin@example.com', 90), class: "avatar s90", alt: ''
       .cover-title
         John Smith

app/views/projects/network/show.json.erb

@@ -9,7 +9,7 @@
         author: {
           name: c.author_name,
           email: c.author_email,
-          icon: image_path(avatar_icon(c.author_email, 20))
+          icon: image_path(avatar_icon_for_email(c.author_email, 20))
         },
         time: c.time,
         space: c.spaces.first,

app/views/shared/members/_member.html.haml

@@ -36,7 +36,7 @@
               Expires in #{distance_of_time_in_words_to_now(member.expires_at)}
     - else
-      = image_tag avatar_icon(member.invite_email, 40), class: "avatar s40", alt: ''
+      = image_tag avatar_icon_for_email(member.invite_email, 40), class: "avatar s40", alt: ''
       .user-info
         .member= member.invite_email
         .cgray