Strange purple blotch from M8 pictures

[Ezzie]

You are welcome. I´m summoning up all my courage to tackle my own sensor in need of a good clean.

 

[Olsen]

It is impossible to conclude from this messy picture taken of 'nothing' at ISO2500. To my opinion, the M8 is unusable at this ISO setting, anyway.

Can't you show us a 'real' picture?