I have a couple of tasks in my list, but when viewed in the slim view (whether on my Android or laptop), some of the items don't appear. I can provide a screenshot of this, if needed.
EDIT: I did a bit of testing and this appears to have to do with the Due date. If my due date is a month out or later, it doesn't show in the slim version. For example, I created a task today (9/12/2013) and assigned a due date of 10/11/2013. That task appears in the Slim version. If I edit that task to give it a due date of 10/12/2013 and refresh the page, it's no longer visible in the Slim version. If I change it back to 10/11, it will return.
Is this by design or a bug? I suppose if a due date is that far out, I don't really *need* to see it on mobile, except that if I'm managing my task list (as opposed to actually doing work), I should have the option of viewing all items if I wish.