I upgraded my localhost (development site) and when I use DIV using product listing as a memu item, no matter what columns and items I use I get only one column. Works under 1.5.5 with Joomla 2.5. perfectly.
Please download again the package from our website and install it over your current install. That will fix the problem.
It's a bug of the new version which was reported a few hours ago.
