Grid Thumbnails

Hi, Isabel!

Try this:

1. Go to Plugins > Editor and select WordPress Popular Posts.
2. On the right column, click on wordpress-popular-posts-3.0.2/style/wpp.css to edit plugin’s stylesheet.
3. Find:

   .wpp-list li { /* LI - post container */
   	/*display:inline-block;*/ /* <-- uncommenting this line is recommended when using post thumbnails */
   	float:none;
   	clear:left;
   }

   … and change it to:

   .wpp-list li { /* LI - post container */
   	display: inline!important;
   	float: left;
   	clear: none;
   	margin: 0 8px 14px 0px;
   	padding: 0!important;
   }

4. Hit Update file to save changes.

Note that any changes made to WPP’s stylesheet will be lost every time you upgrade the plugin because the wpp.css file will be overwritten. You can prevent this by copying the wpp.css file into your theme’s folder (wp-content/themes/YOUR-CURRENT-THEME).