Despite the frosty response to Charles Clarke's intervention this week, 'What do we do about Gordon?' has often exercised the minds of many Labour MPs over the last 12 months.
The options for the future of the Brown government broadly break down into four categories: Brown muddles on, Brown radically changes his style of government; Brown is successfully challenged, Brown resigns of his own accord.
Until recently, I thought the fourth option - resignation - was very unlikely. Prime Ministers are not like ordinary mortals.
If you or I found that large numbers of people were publicly saying we were doing a bad job, then many of us would get the message and step down, or move onto something easier.
But the kind of people who become PM, who have spent their lives seeking power, are not the sort to let go very easily. They hold on amidst the stormiest conditions, and it's very difficult to dislodge them.
But a few days ago someone who's been advising David Miliband convinced me that it's not wholly implausible that Gordon Brown might be an exception to this rule, and suggested circumstances in which Brown might just call it a day.
The theory stemmed from Gordon Brown's famous Macavity tendency - the way in which in the past, whenever there was trouble, he would often disappear from the public eye.
If Labour was heading for a disastrous result in the next election, would Brown be able to face the possibility of a humiliating campaign? Instead, my source suggested, might not Brown step down just before the election, avoid the ridicule and misery, and allow someone else perhaps to carry out a damage limitation exercise. Put that way, it did seem a possibility.
Another scenario would be for Brown to step down because of illness. Indeed three other Prime Ministers since the war - Churchill, Eden and Macmillan - have resigned on the grounds of ill health, though they all lived for many years afterwards.
Gordon Brown, however, appears to be in pretty good condition, especially since losing a lot of weight over the summer. Unlike Tony Blair, who had slight heart difficulties, Brown is not known to have any health problems, and it's hard to believe that in the modern world he could get away with feigning illness without it being discovered.
Over the next few weeks I'll explore the other three options.