I've noticed that the definite article is often omitted preceding the word "problem" in newspapers and magazines. Not in speech, but just in print. Here's an example:
Many politicians feel that taxes must be increased. Problem is, no one is willing to go on the record and say it.
(Instead of beginning the sentence with "the problem", "the" is simply omitted.)
What is the grammatical term for this recent trend? Has anyone else taken note of this phenomenon?