Framegrab - is this a camera/disc error?

Hello

I'm currently DIT on a new feature film.
Camera RED One shot on RED RAW HD. 4K in 24fps.

Today I saw this error in the bottom of the frame, it doesn't look like a digital error, but it's strange that it only appears on one frame.

I've embedded three framegraps - one frame before, frame with error and one frame after.
Can any of you tell me what this is - is something wrong with the camera or hard drive?






Thanks in advantage.

Yours Sincerely

Tina Hedegaard
Editor | Final Cut Pro 7 | Media Composer 5.0 -5.5
Mac OS 10.6.7