canon 5d banding problem

[edu99]

I have just noticed my 5D (mark 1) doing this recently .. consistently, when taking photos an odd horizontal banding appears in the top quarter of the image. eg -

and closeup:

I tried searching the web but haven't found any answers. Has anyone else come across this? Is my sensor fubared?

 

[edu99]

ok looks like it was interference from a wireless flash trigger. that wasn't so bad after all

 

[Hamtastic]

Whoa! What trigger?

 

[KmH]

That is not banding. It does look like RFI (Radio Frequency Interference) though.