In the shot in which Saif Ali Khan is in the shadows, looking at a mirror, director Vishal Bhardwaj suggested that it would be very artistic and beautiful if Khan did it naked. The actor answered, "I am prepared to do that as long as you direct me naked." That was the end of the topic.
The title of the film, "Omkara", was decided by a contest that was open to the public. Three names were shortlisted for the title and the general public voted in by SMS to choose their favorite. The selected names included "Omkara", "O Saathi Re" and "Issak" (the western UP pronunciation of the word "Ishq"). The public voted overwhelmingly in favor of "Omkara". However, all three of the possible titles are songs on the soundtrack ("Issak" being another name for the song "Namak").
The Enfield rifle that Langda Tiyagi (Saif) is shown shooting so accurately does not have a rear sight. The lack of it is plainly visible through the movie but even more so in the scene when he shoots the tires off the marriage bus.
In the scene where Omkara brings Dolly to his house for first time, Indu runs into the house with a sickle in her hand, but the sickle is missing when she is in the house.
During the first scene of dressing up the bridegroom for marriage, Omkara is wearing a garland made from 1000 rupee notes. However, during the marriage, he is wearing a 500 rupee notes garland.
Langda Tyagi: [Opening monologue]
A thin line separates a fool from a fucker. On one end of the line lies the fool and on the other, the fucker. Snap the line then who's the fool and who's the fucker that's the million dollar question, my friend. Let's just see the pretty groom. I'll be damned. You are a fool, right?