Former Liberal Democrat leadership contender Simon Hughes was rebuked yesterday after suggesting that Sir Menzies Campbell needed more time to prove himself in the top job.
Sir Menzies revealed there had been a "free and frank exchange of views," adding: "I don't think Simon was in any doubt as to my reaction to what he had said."
He said: "I have said that I'm not setting any time limits for my leadership and I don't expect anyone else to do so - and that includes Simon Hughes."
Sir Menzies added that there were "other ways" of expressing such views.
Earlier this month, Mr Hughes, the party's president, said the time to assess Sir Menzies' performance was after six months, not "a few weeks".
Sir Menzies also tried to explain why he had struggled to make an impact at Prime Minister's Questions so far.
"I'm not going to go into the technicalities, but if I just point out to you the fact that I don't have a lectern, I have to stand either with my notes in my hand or without notes, that where I stand makes me closer to the Conservatives than it does to my own party.
"But this is all work in progress.
"I'm determined that I will do better at it," he said.
And he said that PMQs was "theatre", not holding the Government to detailed account.
"That's what I regard Parliament as having as its primary purpose and responsibility," he said.
Sir Menzies said he was not aware of any "mutterings" in the party and said he operated an open door policy for people who had issues they wished to raise.
Earlier Sir Menzies won the support from the party's Scottish leader Nicol Stephen.
Mr Stephen, Scotland's Deputy First Minister in the country's ruling Labour-Lib Dem coalition, said the party's strong recent electoral showing north of the border was in no small part down to the new leader's influence.
"I think he's doing exceedingly well. The party in Scotland is doing fantastically. We've won the Dunfermline by-election. Our vote in Moray went up very significantly," said Mr Stephen.
He said that recent polls carried out by the party's political opponents indicated that Lib Dems were in line to win ten extra seats in next May's Scottish elections. Mr Stephen added: "That would take us up to the high twenties from our current number of MSPs of 17.
"Ming Campbell is a core part of that. He's a very popular leader. He's spoken about some of the challenges that he's had in his first 100 days.
"But in terms of the opinion polls, in terms of the support for the party, all the evidence in Scotland is that the momentum is with the Liberal Democrats."