>>>>>Alistair Cockburn (pronounced CO-burn)
>>>>
>>>>Is it ever pronounced differently?
>>>
>>>He is probably got used to mis-pronunciation of his last name...
>>
>>On the house ...
>>
>>He has got used to mispronounciation of his last name...
>>
>>http://encyclopedia.thefreedictionary.com/Pronounciation
>
>Why FireFox spellcheck suggests a different spelling? Are both forms acceptable?

Dunno, but I'd say no

(1) Pronounciation
(2) the auxiliary verb (to be vs to have)