diff --git a/classes/WhatDidTheySayAdmin.inc b/classes/WhatDidTheySayAdmin.inc
index f99f67e..a36dc94 100644
--- a/classes/WhatDidTheySayAdmin.inc
+++ b/classes/WhatDidTheySayAdmin.inc
@@ -103,10 +103,12 @@ class WhatDidTheySayAdmin {
     }
 
     if ($filter_to_use) {
-      $target = $this->get_filters_dir() . '/' . preg_replace('#[^a-z0-9_-]#', '', strtolower($filter_to_use));
-      if (is_dir($target)) {
-        $this->override_filter_info = array();
-        foreach (glob($target . '/*') as $file) {
+      $all_filters = $this->_get_available_override_filters();
+
+      $filter_to_use = preg_replace('#[^a-z0-9_-]#', '', strtolower($filter_to_use));
+
+      if (isset($all_filters[$filter_to_use])) {
+        foreach (glob($all_filters[$filter_to_use] . '/*') as $file) {
           if (preg_match('#\.(php|inc)$#', $file) > 0) { $this->override_filter_info['php'] = $file; }
           if (preg_match('#\.(css)$#', $file) > 0)     { $this->override_filter_info['css'] = $file; }
         }
@@ -864,19 +866,27 @@ class WhatDidTheySayAdmin {
 
   function _get_available_override_filters() {
     $available_filters = array();
-    if (is_dir($this->get_filters_dir())) {
-      foreach (glob($this->get_filters_dir() . '/*') as $dir) {
-        if (is_dir($dir)) {
-          if (basename($dir) == preg_replace('#[^a-z0-9_-]#', '', strtolower(basename($dir)))) {
-            foreach (glob($dir . '/*') as $file) {
-              if (preg_match('#^(.*)\.(inc|php)$#', basename($file), $matches) > 0) {
-                $available_filters[] = basename($dir);
+    $search_path = array(
+      realpath(dirname(__FILE__) . '/../transcript-filters'),
+      $this->get_filters_dir()
+    );
+
+    foreach ($search_path as $target) {
+      if (is_dir($target)) {
+        foreach (glob($target . '/*') as $dir) {
+          if (is_dir($dir)) {
+            if (basename($dir) == preg_replace('#[^a-z0-9_-]#', '', strtolower(basename($dir)))) {
+              foreach (glob($dir . '/*') as $file) {
+                if (preg_match('#^(.*)\.(inc|php)$#', basename($file), $matches) > 0) {
+                  $available_filters[basename($dir)] = $dir;
+                }
               }
             }
           }
         }
       }
     }
+    
     return $available_filters;
   }
 
diff --git a/classes/partials/_default-styles.inc b/classes/partials/_default-styles.inc
index 8259109..4710bf8 100644
--- a/classes/partials/_default-styles.inc
+++ b/classes/partials/_default-styles.inc
@@ -69,14 +69,17 @@
           <?php _e('Use the selected transcript filter set:', 'what-did-they-say') ?>
           <select id="wdts-filters-to-use" name="wdts[filters_to_use]">
             <option value="__default__"><?php _e('(default)', 'what-did-they-say') ?></option>
-            <?php foreach ($available_filters as $filter_name) { ?>
+            <?php foreach (array_keys($available_filters) as $filter_name) { ?>
               <option value="<?php echo $filter_name ?>"<?php echo ($options['filters_to_use'] == $filter_name) ? ' selected="selected"' : '' ?>><?php echo $filter_name ?></option>
             <?php } ?>
           </select>
+          <a href="#" id="refresh-filter-preview"><img src="<?php echo plugin_dir_url(dirname(__FILE__) . '/../../../') . 'graphics/view-refresh.png' ?>" /></a>
         </label>
       <?php } ?>
 
       <div id="wdts-sample-transcript-holder"></div>
+
+      <p><em><?php _e('(Hint: Use the above to preview your filters and style while you work on them! The previewer always includes the default stylesheet.)', 'what-did-they-say') ?></em></p>
       
       <input class="button" type="submit" value="<?php _e('Change default styles', 'what-did-they-say') ?>" />
     </form>
diff --git a/classes/partials/admin.inc b/classes/partials/admin.inc
index a901f4a..907334a 100644
--- a/classes/partials/admin.inc
+++ b/classes/partials/admin.inc
@@ -107,6 +107,10 @@
   };
 
   $('wdts-filters-to-use').observe('change', load_sample_transcript);
+  $('refresh-filter-preview').observe('click', function(e) {
+    Event.stop(e);
+    load_sample_transcript();
+  });
 
   Event.observe(window, 'load', load_sample_transcript);
 
diff --git a/graphics/view-refresh.png b/graphics/view-refresh.png
new file mode 100644
index 0000000..3fd71d6
Binary files /dev/null and b/graphics/view-refresh.png differ
diff --git a/transcript-filters/left-justified-basic/LeftJustifiedBasic.css b/transcript-filters/left-justified-basic/LeftJustifiedBasic.css
new file mode 100644
index 0000000..547969c
--- /dev/null
+++ b/transcript-filters/left-justified-basic/LeftJustifiedBasic.css
@@ -0,0 +1,40 @@
+div.wdts-transcript {
+  border: solid #333 1px;
+  padding: 0.5em;
+  margin: 0.5em;
+  background-color: #C6D9E9
+}
+
+div.wdts-transcript div, div.wdts-transcript span {
+  font-family: inherit
+}
+
+div.wdts-transcript div.wdts-scene-heading {
+  text-transform: uppercase;
+  text-align: inherit;
+}
+
+div.wdts-transcript div.wdts-dialog {
+  text-align: inherit
+}
+
+div.wdts-transcript div.wdts-dialog span {
+  display: inline
+}
+
+div.wdts-transcript div.wdts-dialog span.wdts-name {
+  text-transform: inherit;
+  font-weight: bold
+}
+
+div.wdts-transcript div.wdts-dialog span.wdts-speech {
+  margin: 0
+}
+
+div.wdts-transcript div.wdts-dialog span.wdts-direction {
+  font-style: italic
+}
+
+.wdts-transcript-opener {
+  margin: 0.5em 0;
+}
\ No newline at end of file
diff --git a/transcript-filters/left-justified-basic/LeftJustifiedBasic.inc b/transcript-filters/left-justified-basic/LeftJustifiedBasic.inc
new file mode 100644
index 0000000..f2d9994
--- /dev/null
+++ b/transcript-filters/left-justified-basic/LeftJustifiedBasic.inc
@@ -0,0 +1,18 @@
+<?php
+
+class LeftJustifiedBasic extends WDTSDisplayFilters {
+  /**
+   * Filter for dialog short code.
+   */
+  function filter_shortcode_dialog($name, $direction, $speech, $content) {
+    $content  = '<div class="wdts-dialog"><span class="wdts-name">' . $name . '</span>';
+    if (!empty($direction)) {
+      $content .= ' <span class="wdts-direction">' . $direction . '</span>';
+    }
+    $content .= ': <span class="wdts-speech">' . $speech . '</span></div>';
+
+    return array($name, $direction, $speech, $content);
+  }
+}
+
+?>
\ No newline at end of file