get_posts category not working

I’m using the get_posts function to show some recents posts im using the following code:
$featuredPosts = get_posts('numberposts=4&category=112,68'); i then use a foreach loop to write out what i need for each post.

At the moment it only seems to be showing posts from the first category rather then both. There are only two posts in each category so they should all be showing up. I have even tried having the category set to the negative of the other category that im not using for this section but that shows no results for it. Any ideas of how to show posts from multiple categories?