Whether or not the outpourings are being orchestrated by unhappy sects on the party's left, it all adds up as a collective attempt to destabilise Shearer's leadership.
The big question now is whether yesterday's frenzied blog activity is a one-off expression of that frustration and the number of such postings now ebbs away. Or whether the pressure further builds on Shearer in the lead-up to the conference's opening session on Friday.
No political party can afford to have its actions and behaviour determined by what the blogs are saying. But nor can a party totally ignore them, especially as in this case the frustration is clearly sapping morale.
Smith's argument is that relatively new Labour leaders in Britain and Australia - ones who were quickly written off as losers - have drastically turned their parties' fortunes around within the past 12 months thanks to some powerful speeches which connected with voters.
Shearer has yet to celebrate 12 months in the job - if "celebrate" is the right word. This weekend's conference is his first as leader. He should be given that opportunity to prove his critics wrong.
If he fails, there is still plenty of time before the 2014 election for the party to decide whether he stays or goes.