diff --git a/seahub/templates/repo.html b/seahub/templates/repo.html
index 2e9c23b7b3..365f363860 100644
--- a/seahub/templates/repo.html
+++ b/seahub/templates/repo.html
@@ -1901,40 +1901,6 @@ $('.file-share, .dir-share', context).click(function() {
     return false;
 });
 
-{% if not repo.encrypted and ENABLE_THUMBNAIL %}
-// get thumbnails for image files
-$(function() {
-    var img_icons = $('.not-thumbnail');
-    if (img_icons.length == 0) {
-        return;
-    }
-    var get_thumbnail = function(i) {
-        var img_icon = $(img_icons[i]),
-            file_name = img_icon.closest('.file-item').attr('data-name');
-        $.ajax({
-            url: '{% url 'thumbnail_create' repo.id %}?path=' + e(parent_dir + file_name),
-            cache: false,
-            dataType: 'json',
-            success: function(data) {
-                if (data) {
-                    img_icon.attr("src", data.thumbnail_src).load(function() {
-                        $(this).removeClass("not-thumbnail").addClass("thumbnail");
-                    });
-                }
-            },
-            complete: function() {
-                // cur_path may be changed. e.g., the user enter another directory
-                if (i < img_icons.length - 1 && parent_dir == cur_path) {
-                    get_thumbnail(++i);
-                }
-            }
-        });
-    };
-    var parent_dir = cur_path;
-    get_thumbnail(0);
-});
-{% endif %}
-
 } //function 'opOnDirent' ends here
 
 $('#add-new-file-form, #add-new-dir-form, #rename-form, #mv-form').submit(function() {
@@ -2391,77 +2357,6 @@ function updateCmt() {
     });
 {% endif %}
 
-{% if not repo.encrypted and ENABLE_THUMBNAIL %}
-var timer, ajaxRequest = {},
-    default_size = {{PREVIEW_DEFAULT_SIZE}},
-    preview_wrap = $('<div id="preview-wrap"><img id="image-preview" src="" alt=""/><div class="outer-caret right-outer-caret"><div class="inner-caret"></div></div></div>')
-        .appendTo("body")
-        .css({'width':default_size + 'px', 'height':default_size + 'px'})
-        .hide(),
-    image_preview = $("#image-preview"),
-    caret = image_preview.next();
-
-$("#repo-file-list").on({
-    mouseenter: function() {
-        var thumbnail = $('.thumbnail', $(this)),
-            file_item = thumbnail.closest('.file-item');
-
-        timer = setTimeout(function () {
-            ajaxRequest = $.ajax({
-                url: '{% url 'thumbnail_create' repo.id %}?path=' + e(cur_path+file_item.attr('data-name')) + '&size=' + default_size,
-                cache: false,
-                dataType: 'json',
-                success: function(data) {
-                    if (data) {
-                        image_preview.attr("src", data.thumbnail_src);
-
-                        var file_item_offset = file_item.offset(),
-                            thumbnail_offset = thumbnail.offset(),
-
-                            wrap_width = preview_wrap.outerWidth(),
-                            wrap_padding = parseInt(preview_wrap.css('padding-top')),
-
-                            caret_width = parseInt(caret.css('border-top-width')),
-                            caret_pos_x = (default_size)/2 + wrap_padding - caret_width,
-                            caret_pos_y = default_size + 2 * wrap_padding,
-
-                            wrap_left = file_item_offset.left - wrap_width - caret_width;
-
-                        if (wrap_left >= 0) {
-                            caret.removeClass('bottom-outer-caret')
-                                .addClass('right-outer-caret')
-                                .css({'top':caret_pos_x + 'px', 'left':caret_pos_y + 'px'});
-
-                            preview_wrap.css({
-                                'top'  : (thumbnail_offset.top + (thumbnail.height() - wrap_width)/2) + 'px',
-                                'left' : wrap_left + 'px'
-                            }).fadeIn();
-                        } else {
-                            caret.removeClass("right-outer-caret")
-                                 .addClass("bottom-outer-caret")
-                                 .css({'top':caret_pos_y + 'px', 'left':caret_pos_x + 'px'});
-
-                            preview_wrap.css({
-                                'top'  : (file_item_offset.top - wrap_width) - caret_width + 'px',
-                                'left' : (thumbnail_offset.left + (thumbnail.width() - wrap_width)/2) + 'px'
-                            }).fadeIn();
-                        }
-                    }
-                }
-            });
-        }, 200);
-    },
-    mouseleave: function() {
-        if (ajaxRequest.hasOwnProperty('abort')) {
-            ajaxRequest.abort();
-        }
-        clearTimeout(timer);
-        preview_wrap.hide();
-        image_preview.attr('src', ''); // for ff. In ff, when hover, the last preview image would be shown first, then the right one.
-    }
-}, ".dirent-icon:has('.thumbnail')");
-{% endif %}
-
 {% include "snippets/shared_link_js.html" %}
 {% include "snippets/bottom_bar.html" %} {# moved to the right side. Tue Nov 11 15:47:08 CST 2014 #}
 </script>
diff --git a/seahub/templates/repo_shared_link.html b/seahub/templates/repo_shared_link.html
index 6b393cad41..231b53296d 100644
--- a/seahub/templates/repo_shared_link.html
+++ b/seahub/templates/repo_shared_link.html
@@ -107,6 +107,7 @@ $('#shared-links .rm-link').click(function() {
     }
     $.ajax({
         url: ajax_url + '?t=' + e(link_token),
+        cache: false,
         dataType: 'json',
         success: function(data) {
             op.parents('tr').remove();
diff --git a/seahub/templates/snippets/repo_dir_data.html b/seahub/templates/snippets/repo_dir_data.html
index aa0a1b89f4..c1cd6fa3f4 100644
--- a/seahub/templates/snippets/repo_dir_data.html
+++ b/seahub/templates/snippets/repo_dir_data.html
@@ -3,7 +3,7 @@
     <p class="path fleft">
     {% for name, link in zipped %}
     {% if forloop.first or not forloop.last %}
-    <a href="{% url 'view_common_lib_dir' repo.id link|urlencode|strip_slash %}" class="dir-link normal">{{ name }}</a> /
+    <a href="{{ SITE_ROOT }}repo/{{ repo.id }}/?p={{ link|urlencode }}" class="dir-link normal">{{ name }}</a> /
     {% else %}
     <span id="cur-dir-name" data-name="{{ name }}">{{ name }}</span> /
     {% endif %}
diff --git a/seahub/templates/snippets/repo_dirents.html b/seahub/templates/snippets/repo_dirents.html
index 4cc1b9b830..96b488f91c 100644
--- a/seahub/templates/snippets/repo_dirents.html
+++ b/seahub/templates/snippets/repo_dirents.html
@@ -55,15 +55,9 @@
             <span title="{% trans 'unstarred' %}" class="icon-star-empty file-star" data-status="unstarred"></span>
             {% endif %}
         </td>
-        {% if dirent.allow_generate_thumbnail %}
-            {% if dirent.thumbnail_src %}
-                <td class="dirent-icon"><img class="thumbnail" src="{{ dirent.thumbnail_src }}" alt="{% trans "File"%}" /></td>
-            {% else %}
-                <td class="dirent-icon"><img class="not-thumbnail" src="{{ MEDIA_URL }}img/file/{{ dirent.obj_name|file_icon_filter }}" alt="{% trans "File"%}" /></td>
-            {% endif %}
-        {% else %}
-            <td class="dirent-icon"><img src="{{ MEDIA_URL }}img/file/{{ dirent.obj_name|file_icon_filter }}" alt="{% trans "File"%}" /></td>
-        {% endif %}
+        <td class="dirent-icon">
+            <img src="{{ MEDIA_URL }}img/file/{{ dirent.obj_name|file_icon_filter }}" alt="{% trans "File"%}" />
+        </td>
         <td>
             {% if repo.encrypted and repo.enc_version == 2 and not server_crypto %}
             <span class="dirent-name">{{ dirent.obj_name }}</span>
diff --git a/seahub/views/ajax.py b/seahub/views/ajax.py
index 63602b0d76..539f40d1f2 100644
--- a/seahub/views/ajax.py
+++ b/seahub/views/ajax.py
@@ -297,14 +297,6 @@ def list_dir(request, repo_id):
     uploadlink = get_uploadlink(repo.id, username, path)
     dir_shared_upload_link = get_dir_shared_upload_link(uploadlink)
 
-    for f in file_list:
-        file_path = posixpath.join(path, f.obj_name)
-        if allow_generate_thumbnail(request, repo_id, file_path):
-            f.allow_generate_thumbnail = True
-            if os.path.exists(os.path.join(THUMBNAIL_ROOT, str(THUMBNAIL_DEFAULT_SIZE), f.obj_id)):
-                src = get_thumbnail_src(repo.id, THUMBNAIL_DEFAULT_SIZE, file_path)
-                f.encoded_thumbnail_src = urlquote(src)
-
     ctx = {
         'repo': repo,
         'zipped': zipped,
@@ -324,7 +316,6 @@ def list_dir(request, repo_id):
         'enable_upload_folder': settings.ENABLE_UPLOAD_FOLDER,
         'current_commit': head_commit,
         'info_commit': info_commit,
-        'ENABLE_THUMBNAIL': ENABLE_THUMBNAIL,
     }
     html = render_to_string('snippets/repo_dir_data.html', ctx,
                             context_instance=RequestContext(request))
@@ -388,14 +379,6 @@ def list_dir_more(request, repo_id):
     if dirent_more:
         more_start = offset + 100
 
-    for f in file_list:
-        file_path = posixpath.join(path, f.obj_name)
-        if allow_generate_thumbnail(request, repo_id, file_path):
-            f.allow_generate_thumbnail = True
-            if os.path.exists(os.path.join(THUMBNAIL_ROOT, str(THUMBNAIL_DEFAULT_SIZE), f.obj_id)):
-                src = get_thumbnail_src(repo.id, THUMBNAIL_DEFAULT_SIZE, file_path)
-                f.encoded_thumbnail_src = urlquote(src)
-
     ctx = {
         'repo': repo,
         'user_perm': user_perm,
@@ -405,7 +388,6 @@ def list_dir_more(request, repo_id):
         'file_list': file_list,
         'ENABLE_SUB_LIBRARY': ENABLE_SUB_LIBRARY,
         'sub_lib_enabled': sub_lib_enabled,
-        'ENABLE_THUMBNAIL': ENABLE_THUMBNAIL,
     }
     html = render_to_string('snippets/repo_dirents.html', ctx,
                             context_instance=RequestContext(request))