On Jul 9, 2008, at 11:04 PM, jeffrey morin wrote:

> I have a question regarding the differences in font-size I see between
> Safari 3 and FF2. I am attempting to use the Blueprint CSS and when I
> customize my font sizes using em Safari seems to render the text  
> slightly
> larger than FF2 (haven't checked any IE yet). Does anyone know what  
> could be
> the cause of this? I have never quite been able to get this right  
> but really
> don't want to use straight px to declare font-size. I am using a 15"  
> mac
> book pro to develop. Any advice or personal experience with this  
> would be
> great. Thanks!
Yes it happens. Blame the old QuickDraw technology used by Fx 2 (Mac)…  
Fx3 (Mac) renders text with Atsui, the same way as WebKit does.
It is not the only factor: differences in how rendering engines round  
off to the nearest pixels also play a role and differences in subpixel  
smoothing.
For some fonts, Safari 'cheats' a little bit, and kinda uses a hack to  
match the font-metrics of Times, Helvetica, Courier,... to match their  
counterparts on Windows (Times New Roman, Arial, Courier New,...) – it  
is not limited to those 3 fonts.

And there are some slight differences between 10.4 and 10.5 as well.  
Most of the time you won't notice them though.

Philippe
---
Philippe Wittenbergh
http://l-c-n.com/





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