There are a number of areas of serious concern here. One major area is the cash to debt ratio. Blackberry has bragged over the past few years about its cash "hoard", which at one time was slightly over $3 billion, and its low debt load. But now, that's reversed, and is a big problem, but I don't see much writing about it.
As of the last quarter, Blackberry claimed $1,2 billion in cash and equivalents, and $1.5 billion in long term debt. This should be triggering many cautionary notices, but I haven't seen them yet. One big reason why Blackberry can claim a small profit after subtracting all of these "one time" expenses, is because they are rapidly burning through their cash. What happens when that cash is almost gone? Usually a bankruptcy hearing is next. We'll have to see what happens.