It didn't put any white lines or artifacts for me.
Chrome 22.0.1229.94, WinXP
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https://img.skitch.com/20121011-k29i1jdb68u41g1ikhqdkemmjx.j...
Chrome 21.0.1180.89, OS X (10.6.8)
I've been able to replicate this in my own projects as well.