oui....
d après le post sur un forum astronomie,

Copier/coller d'une réponse de Canon à un consommateur: ils sont sur le pont et promettent une solution:
"Thank you for your inquiry. We value you as a Canon customer and appreciate the opportunity to assist you. We are sorry to hear that you are reconsidering the purchase of your 5D Mark II.

It has been reported that some users are experiencing a phenomenon where small black dots appear when small, bright, point light sources are included in a photograph. Canon Inc. recognizes this issue, and is preparing a countermeasure. We will provide further details as they become available.

We certainly apologize for any inconvenience this causes you.

We hope this information is helpful to you.

Thank you for choosing Canon"

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