diff --git a/boards/static/css/md_centered/base_page.css b/boards/static/css/md_centered/base_page.css
--- a/boards/static/css/md_centered/base_page.css
+++ b/boards/static/css/md_centered/base_page.css
@@ -1,6 +1,6 @@
 @import url("../md/base_page.css");
 
-.thread, .post-form-w, .image-mode-tab, .tag_info, .bar-bg, .page_link {
+.thread, .post-form-w, .image-mode-tab, .tag_info, .bar-bg, .page_link, .post_preview {
     max-width: 1000px;                                                                
     margin-left: auto;                                                                
     margin-right: auto;