Map shows blank or grey

This seems to mainly affect responsive designs, and it is normally because something in the theme file hides images in the main content area. Search your main css file for a declaration for “img” that sets it to display:none.

List doesn’t show, and paging says 1 to Infinity

Your theme or another plugin is loading a very old version of jQuery (normally 1.4.2) that doesn’t support the .data() method. Look in your theme’s functions.php file for the jQuery include and update this.