Hart was beaten twice at his near post in Manchester City's humbling defeat by Bayern Munich. First Franck Ribery's went through the diving goalkeeper before Arjen Robben's effort - with his right foot - made it 3-0 to the Germans.
But Wednesday's errors weren't Hart's first this season. He slipped up in City's shock defeat by Cardiff City when flapping at a corner, allowing former Manchester United striker Fraizer Campbell to nod home.
Not again: Arjen Robben beat Joe Hart (left) at the near post to put Bayern Munich 3-0 up
And before that Hart had a dodgy moment on the international stage too, when he allowed James Morrison's shot to pass despite it appearing as a routine save for a player of the England No 1's quality.
It isn't always wise to drop your goalkeeper, and England have been stung in the past. Scott Carson got the nod over Paul Robinson in 2007 for the Euro 2008 qualifier against Croatia.
Niko Kranjcar's long-range effort somehow slipped out of the then-Aston Villa goalkeeper's grasp and into the back of the net, handing Croatia the opening goal. England went on to lose the game 3-2 and failed to qualify for the European Championship under Steve McClaren.
And another: Hart flapped at a cross against Cardiff to hand Fraizer Campbell the chance to score
Oops: Hart allowed a James Morrison shot to slip through his grasp in England's friendly against Scotland
But Hart still has plenty of supporters. Former Manchester City goalkeeper Joe Corrigan backed the current incumbent to retain his place between the sticks for England.
Speaking on the Alan Brazil Sports Breakfast on talkSPORT, Corrigan said: 'I think he has got to [trust Hart].
'The difficulty is putting in young kids in such important games. They did it with Scott Carson and Robert Green and they make a mistake and are lambasted for the rest of their careers.
'If a young kid comes in, what will the press say about Roy? It's such an important game for England - they have got to go with the experience.
'I don’t think they will be taking a chance because it is a tried and trusted situation [with Hart in goal].'
Hart is a goalkeeper of undoubted quality, he has done more than enough to prove that since deposing Shay Given as No 1 when Roberto Mancini took over at the Etihad in 2010.
But if Hart is no longer guaranteed a starting place in the national set-up due to his questionable performance of late, who are Roy Hodgson's other options?
Rough night: Hart was hardly culpable for Thomas Muller's (right) goal that put Bayern two up
Knowing: Hart cuts a frustrated figure after allowing Franck Ribery to open the scoring at the Etihad
Wise move? Scott Carson replaced Paul Robinson
in 2007, but it cost England dearly when the former Aston Villa
goalkeeper let Niko Kranjcar's shot bounce into the net. England lost
the game 3-2
Nicknamed the ‘Great Wall’ by Spanish journalists a year ago, when Celtic beat Barcelona, the giant was again in top form against Barca in the Champions League this week.
He is playing regular first-team football, on the European stage, and has been in Roy Hodgson’s squads over the last 12 months.
Brick wall: Fraser Forster put in a sensational performance against Barcelona in the Champions League
The only thing which counts against the 6ft 7in goalkeeper is his relative inexperience.
Forster, 25, Started at Newcastle but did not make the breakthrough there and went to several clubs on loan, including Norwich where he was highly rated by then-manager Paul Lambert.
John Ruddy
A stalwart for Norwich over the last three years and showing good form in the Premier League again this season.
Ruddy, 26, was unlucky to break a finger, which ruled him out of Euro 2012 and a taste of tournament football.
Stalwart: John Ruddy has put in the hours for Norwich to become a solid Premier League goalkeeper
He has one cap, won in August 2012 in a friendly against Italy in Switzerland when he replaced Jack Butland.
Playing regular first-team football, which should count for him, but not in Europe. He is 6ft 4in tall.
Jack Butland
There have been high hopes surrounding Butland ever since he started to progress as a kid at Birmingham. In fact, his name has been around so long it is easy to forget that he is still only 20.
A year ago he became the youngest England goalkeeper to play for the senior team. He was 19 years, 158 days old when he won his first cap in the same friendly as John Ruddy andhe also played for GB at the London Olympics.
New kid on the block: Jack Butland moved on loan to Barnsley to boost his World Cup chances
However, 6ft 5in Butland has seen his career stall this summer following a £3.5million move from Birmingham to Stoke and has just gone out on loan to Barnsley.
Robert Green
Yet another goalkeeper with a Norwich link. Green spent a decade at Carrow Road and seems to have been around for ever.
But anyone who has watched QPR this season will confirm that the 33-year-old veteran has been looking more like spring Green.
How many? Robert Green has helped QPR to seven Championship clean sheets in a row
Yes, it is only the Championship but Green has been in and out of the England set-up since 2004 and has come back stronger from the clanger against the USA at the 2010 World Cup. He has a wealth of experience and that is what Hodgson needs now.
Ben Foster
The obvious choice to challenge Joe Hart for a place in the England set-up but the West Brom goalkeeper is currently laid up after an operation on his right foot so has no chance of staking his World Cup claim this autumn.
Foster, 30, first broke into the England squad in 2006 and has since retired and come out of retirement for his country.
Waiting game: Ben Foster is out until late November after an operation on his ankle
Plenty of club experience and a Steady Eddie personality would suggest he is a safe pair of hands, even if he is not as talented as Hart, but he would need someone else to do him a favour and make sure that England qualified - then he could challenge for Rio next year.
Joe Hart wasn't the only goalkeeper in Champions League Group D to make a costly mistake this week.
Viktoria Plzen goalkeeper Matus Kozacik had a stinker when he let team-mate Radim Reznik's tame back-pass roll under his foot and over the line for CSKA Moscow's third goal in the 3-2 defeat.
Not only was the goal decisive for the Russians but the blameless Reznik now has an own goal etched on to his record.
VIDEO: Watch Matus Kozacik let the ball roll into his net
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