You’re probably already across this, but there were quite a few changes in WordPress 4.3, which was released a couple of days ago. If you haven’t already, you should make sure your themes / plugins cater for these.
Note, we’re starting to reject items using PHP4-style constructors, commonly used when creating widgets (amongst other things), as warnings now appear for this when WP_DEBUG is turned on.
While we’re at it, it’s probably worth mentioning that WooCommerce 2.4 was released earlier this month. If your item supports WooCommerce, you should check out the changes, especially if your item adds fields to variations or alters the display of variations. There were also some template changes which will affect themes.