I am currently running Linux (Ubuntu 14.04) and my copy of Mathematica suddenly started misbehaving. I am not sure what I did to invoke this. The splash screen when Mathematica is launched kept freezing at "Initializing preferences" or some such.
From this SE, I was directed to Wolfram Support. I followed both steps to
perform clean start-up but to no avail. I even deleted all folders and re-installed mathematica but that hasn't helped either. I am at a loss right now and was wondering if anyone has encountered this.