This afternoon, the Labour leader returned to the stage - in shirt sleeves this time - to face questions from his audience.
One introduced herself: "Christina Rees, newly-elected Labour councillor for Bridgend."
So far so good. But then it got trickier.
"And you haven't kissed me, Ed, but you kissed Barbara yesterday and I'm extremely jealous," joked Christina.
A look of mock alarm came over the leader's face as he assured delegates: "Don't get the wrong idea by the way."
Christina told her leader how Labour had won a by-election in Bettws: "The Tories only got 12 votes!"
Ed Miliband started to look concerned: "Don't give us all the Bridgend results because we might be here....."
He cut swiftly to his next questioner - Barbara Jones, from Caerphilly, who introduced herself thus: "I am the lucky one that got the kiss yesterday and I've had so many texts you wouldn't believe it."
Had he not been wearing television make-up, Ed Miliband surely would have blushed. Instead, he briefly referred to delegates as "comrades" for the first time, while imploring Barbara to move on.
Barbara moved on, but 24 hours into the era of "one nation Labour" the leader has discovered that you can't please all the people all the time.

Anthony McIntyre conducted a series of interviews with former IRA members, on the understanding that the contents would not be made public until after their deaths.
Boston College has been issued with a subpoena instructing it to hand over the material on 6 May.
Mr McIntyre said he had engaged a lawyer to "resist the efforts to raid his personal memoirs".
Dozens of loyalists and republicans provided testimonies to Boston College staff compiling an oral history of the Northern Ireland conflict.
What are the 'Boston tapes'?
Dozens of former paramilitaries were interviewed in Belfast and other cities and towns from 2001-2006 as part of an oral history project known as the Belfast Project.
Details about internal politics and activities of the IRA were revealed on tape, including accounts of a hunger strike in prison in the 1980s.
Overall, the project cost about $200,000 (Â£118,520), mostly provided by an Irish-American businessman.
Each interview was transcribed, sent by encrypted email to New York and then the material was sent to Boston College, where it was placed under lock and key at Burns Library.
Following a lengthy legal battle with the college, the Police Service of Northern Ireland gained access to a small number of the interviews in 2013.
Interviews were given on the understanding that tapes would not be made public until after their deaths.
Detectives want to access the recordings as part of their investigations into murder and other paramilitary crimes from the 1970s to 1990s.
In June last year, police were given access to interviews given by former loyalist prisoner Winston Rea.
It followed a decision by senior judges in Belfast to lift an injunction on the PSNI taking possession of Mr Rea's recorded account to Boston College researchers.
In 2013, detectives investigating the abduction and murder of Belfast mother-of-10 Jean McConville in 1972 secured the transcripts of former IRA woman Dolours Price's account.
That material was handed over following court battles on both sides of the Atlantic.

The poll was held as former Labour MP Huw Irranca-Davies stood down to run for - and win - the Welsh Assembly election in the same area, part of Bridgend county borough.
In the 2015 General Election, Labour won the seat with 52% of the vote and the Conservatives came second with 15%.
UKIP came second this time around.
Ed Miliband may have wowed delegates with his "look - no notes" speech to the Labour conference but not everyone is going home happy.
[NEXT_CONCEPT]
The Public Prosecution Service and the PSNI have launched a legal bid to gain access to all interviews and notes by a former IRA member who was one of the main researchers for a Troubles history project at Boston College.
[NEXT_CONCEPT]
Labour's Christopher Elmore has become the new MP for Ogmore after winning the Parliamentary by-election with 52% of the vote.