I just downloaded this plugin and I'm so excited because I've been looking for months for something like this, just a simple portfolio, and I haven't been able to find one. This looks like exactly what I want, except I am getting an error on my Portfolio page:
Warning: Invalid argument supplied for foreach() in /home/motif/public_html/wp-content/plugins/arconix-portfolio/includes/class-portfolio.php on line 367
I simply installed the plugin, created a portfolio page, and added the short code. Then I added a sample test portfolio item.
Here is my Portfolio page, showing the error on it: http://www.sitemotif.com/portfolio/