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Interesting technique, but it does use JavaScript (but degrades nicely).

A couple of side-effects: Firefox 3.0.8 is pretty sluggish when scrolling (although it might be better with only one instance of this used), also you can't (visibly) select the text that has this applied to it.

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Looks good, but I also experienced unbearable sluggishness on Linux/Firefox when scrolling.

Specifically, Xorg and firefox processes use nearly all my CPU when I scroll.

It's unusable in its current form (at least on this system). Hopefully you can tune your code; this is a neat effect.

Unusable for me on Linux/firefox too.

There seems to be something really slow about javascript-heavy sites on Unix, I think.

I'm really curious what the underlying cause is, if it's not just perception bias on my part.

Possibly, since I don't use anything else I don't know (except in a virtual machine). I get the impression however that the firefox people spend a lot of time optimizing for MacOS and Windows that they don't spend on Linux for some reason.

same for IE6

Performance is not a problem in Chrome, but readability is. It's virtually unreadable because of fuzzy text rendering.

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