Canon Err30 on 1dmkiii

[ABBOTALE]

i get this code every so often? i have turned camera off/on cleaned battery contacts? I noticed this only happens in bright light and go over 1/2550th sec shutter speed any suggestions can this be repaired/serviced in the uk AS Canon say there no parts in the uk ALTHOUGH  the mk1v use most of the same parts

[ebiggs1]

Your shutter is failing. It won't fix itself or get better.