I have added detailed shots to http://code.newtypography.co.uk/?p=898

At 400% magnification the difference does not look so great, but at 100% the 
difference in rendering is noticeable. I'll leave hinting interpreation to the 
experts, but to my eyes the vertical extremes of curves are not being flattened 
quite enough, thus creating extra sub-pixels (see the 400x magnifications).  
This seems to be the opposite of what is happening at other px sizes where the 
vertical extremes of curves tend to get overflattened, e.g. the 'O' at 15, 19, 
21px.

-vern



On 18 Jun 2011, at 04:42, Werner LEMBERG wrote:

>> Of note is that at larger sizes (20px - 30px) the rendering breaks up
>> on curves. Is it possible that the autohinter is not yet set to
>> instruct those larger sizes?
> 
> What do you mean with `breaks up'?  Please give more details what
> exactly you think is bad.  The hinting range is set to 8ppem-1000ppem,
> BTW, so these sizes are covered.

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