Hi,
If nobody reported it it’s probably they did not set WP_DEBUG to true.
To reproduce :
– get a fresh WordPress 3.6 install
– set define('WP_DEBUG', true)
in wp-config.php
– install & activate this plugin
– put the shortcode in a page/post then display it
ps: I also saw a hardcoded wp-content
in the wpprojects_portfolio_clear
function (wppcr-functions.php), it’s not a problem for my case right now, but for people who change the content folder it may become one.