Tom Chambers (right) ended up winning the final
Ofcom has backed the BBC after nearly 300 people complained to the media watchdog over a scoring error on the talent show Strictly Come Dancing.
At last year's semi-final, two of the three celebrity couples tied after the judges delivered their scores.
This meant that the public vote could not help the lowest-placed contestants, Holby star Tom Chambers and dancer Camilla Dallerup, avoid the dance-off.
But Ofcom said the BBC had acted swiftly and acknowledged the error.
Presenter Tess Daly explained the scoring tie during the results show and announced that all three couples would be put through to the final.
The BBC also offered refunds to its viewers.
Bruce Forsyth and Tess Daly apologised to viewers
At the time, nearly 1,800 complained to the BBC about the mistake, saying they felt let down.
But Ofcom acknowledged the BBC had deeply regretted the incident and had gone on to review its voting and judging procedures.
"Ofcom was satisfied that appropriate steps were taken by the BBC and the disadvantage to viewers minimised," it said in a written statement.
"In Ofcom's view the BBC had been open and transparent with viewers about the mistake it made and the solution adopted."
Strictly Come Dancing presenters Bruce Forsyth and Tess Daly opened the grand final last December by apologising again to viewers for the voting problems which marred the semi-final.
Chambers and Dallerup went on to win the competition.
Dallerup has since announced she is to quit the ballroom dancing show.
"I've had a fabulous time on Strictly, five years and six series, but I'm a girl that needs fresh challenges," she told BBC Radio Norfolk earlier this month.
"My mum always told me you should leave a party while you're still having a good time. After lifting the trophy with Tom, how could things get any better!"