Steve Bucknor has raised the issue to cover up for his own mistakes. There were several times when he made glaring errors in adjucating LBW decisions which has cost India the match and a player his reputation. Sachin has been at his receiving end. Some of his decisions have been appaling - recall his obstinacy in not seeing TV replay which allowed Jonty to get away with a run out. He scored 91 and saved SA in 1991-92 against India .

Venkataraghavan as a player himself was at the centre of atleast two controversies - when Shambhu Paan ruled him caught behind when he was not out, which caused spectators to disrupt the Test match in Brabourne stadium in 1969-70. Second occasion was in England at the Oval in 1979 when Venkat was ruled runout though he was inside the crease . India could possibly have won the test match had he been ruled otherwise. India ultimately drew that Test missing the target narrowly by 9 runs . I am not sure if it was David Constant or Ken palmer who gave that decision .
There are several instances such as these.
Technology will also reduce allegations of bias. Those who have read Sunny Days by Sunil Gavaskar will admire the little master’s comments on David Constant who ruled Sunny out lbw at critical times even though the ball used to pitch outside the leg stump. And of-course can we recall the retort by Chandrasekar to a NZ umpire when he asked him ” He is bowled , but is he Out ? ” .
Have we forgotten how Pakistani umpires used to favour Miandad, Zaheer Abbas , Muddassar Nazar , Majid khan and company while playing India ?