Marina's having some serious troubles at home, and recently suffered a fairly serious mental breakdown. From what I've been able to gather, which isn't much, it really isn't very pretty. "Distraught" would be putting it lightly.
Granted, you wouldn't really figure this out too quickly by looking at her on the boards, but Marina has been diagnosed with bipolar disorder, which basically means she's either happy, or on the complete opposite end in depression, and it goes without saying she's hit that other end of the swing. There's no danger of Marina turning suicidal, that much was, is, and has been established a myriad of times; but I think its safe to say she'll be a hell of a lot more mellow after she, hopefully, gets back to normal.
Let her know you're behind her all the way. Light a candle and say a prayer, or light one at the page below and everyone will know we're with her. (If you do light a virtual candle, please sign it, and add for Marina to the Name box, show your support)