Tindall was replaced by Catt last week for England's semi-final clash against France as coach Clive Woodward looked to take some pressure off star fly-half Jonny Wilkinson and Tindall admitted that he had been upset at being left out of the side without any explanation.
But the big outside back was supported by the man that replaced him, Catt, and now Tindall has repaid that support.
"I was disappointed to be left out but happy to be involved at the end of the game. Clive [Woodward] didn't give me any reasons," said Tindall.
"Mike was the first person to say 'sorry mate' last week and we can't be upset with each other at all. I was the first to say 'sorry mate' to him today [Wednesday]."
The Yorkshireman's return to the team can be viewed in different ways.
He is seen as the man who can hammer up – in attack and defence – against the Australian centre pairing of Elton Flatley and Stirling Mortlock. But the selection might not be as conservative as that as Tindall was part of the backline that scored three tries in England's 25-14 win over Australia in the summer.
Tindall would not give away any tactical secrets, however, other than to predict just how furiously England would attack as they attempt to win their first world crown.
"Am I an attacking or a defensive change?" he said. "We haven't really got our attack going yet so we'll have to see.
"But I'm sure we've got a few things we haven't used yet, like throwing the kitchen sink at them."
As the clock winds down towards the kick-off, the overwhelming size of support for England in Sydney is becoming apparent.
"It was an experience being on the bench against France. You can hear the crowd and the sheer force of our fans was awesome," said Tindall, after witnessing the noise generated by the 30,000 who drowned out everyone else at the semi-final.
And the 'Barmy Army' were out in force again on the Manly beach-front when he posed for pictures after the team announcement.
Tindall's walkabout ended with him signing anything that moved – including one man's bald head – and posing for pictures with dozens of fans.
When he crossed the road back to the hotel he received a huge round of applause. It was an indication, if any were needed, of the size of the support England will receive when Saturday comes.