I ran across the problem, I need to make it easy for users to read the text, so I used letter-spacing of 1 px, but it looks ugly, so I thought I'll use half a pixel so 0.5px, but it doesn't work, I tried using em attributes, but didn't achieve the task.
So is there a way to make letter spacing half pixel (cross browser solution if possible)
This bug has been reported back in 2008 and is confirmed. So if someone feels like hacking into webkit that would make a lot of designers happy.
https://bugs.webkit.org/show_bug.cgi?id=20606