Posted: 03/10/2012 at 12:28
Most Acers are killed or damaged by overwatering or waterlogging - for example putting in a pot too large for it.
Secondly wind - they hate wind, esp young ones
Third - they do take sun, taking more sun with maturity
Fourth - good draining soil, they really do not need acidic soil. A well fertilised soil is great as they have surface roots that feed. A leaf much and they will be happier still.
@ Robin - looks like wind damage to me