OK, been taking a look at this - there is clearly some oddness in the tuning that if I fix up, means that sharpening is noticeable. Not as pronounced as the OV5647, but this is sensor dependant, so that not to difficult to believe. I reckon sharpening was being applied, its just that the effects were so slight as to be unnoticable.
I'll tidy up the whole area and double check with everyone that its OK to update the firmware tomorrow.
Principal Software Engineer at Raspberry Pi (Trading) Ltd.
Contrary to popular belief, humorous signatures are allowed. Here's an example...
"My grief counseller just died, luckily, he was so good, I didn't care."