Not too sure CT, the only thing I have altered on camera is the ISO setting which was previously set to auto. Having previously experienced some noise in shots, today I have manualy set the Iso to between 1000 and 1600, shot in aperture priority.
I was wondering if it could be the effect of the lighting today at the time when the shots were taken?
As you rightly say, it is no problem as it can be altered at the time of processing the raw files.
The tone of the two original shots have been enhanced using colour balance in PhotShop.
Regards: Gordon