[Plugin: Ultimate Post Type Manager] Strange code in cpt display

Hi – I am having a problem with strange code showing in my cpt display. Here’s an example: a:1:{s:4:”text”;s:8:”LL12 9DW”;}

What can be causing this? Happening on live site so pretty urgent.

Thanks in advance for any help!

http://wordpress.org/extend/plugins/ultimate-post-type-manager/