<p>I think the problem here is that the mouseover effect depends too much on the map behind. For example, it's pretty noticeable if it's over the sea, but not if it's over blank land (screenshots from the transport map)</p>
<p><a href="https://f.cloud.github.com/assets/360803/843322/c42eb546-f3bb-11e2-8bdf-f1f7fc57584f.png" target="_blank"><img src="https://f.cloud.github.com/assets/360803/843322/c42eb546-f3bb-11e2-8bdf-f1f7fc57584f.png" alt="screenshot from 2013-07-23 18 11 48" style="max-width:100%;"></a></p>
<p>If the mouseover effect is a useful visual cue (which I think it is) then it needs some thought as to how to make it work irrespective of backgrounds.</p>
<p><a href="http://www.mapbox.com/osmdev/2013/07/19/implementing-osm-vision/">http://www.mapbox.com/osmdev/2013/07/19/implementing-osm-vision/</a> has three screenshots of the new UI, all over water. If it's been developed with mainly water / urban backgrounds, that might explain the hiccup over blank white-ish backgrounds.</p>
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