I gave it a quick look and I must say it looks a lot more professional than before.
Now looking at the whole page I actually don't find it that bad, but I would have prefered some less strong colors and the strong green only for they highlights, as I said before. But I guess this isn't the highest priority. As Carsten said that those icons should be easily adaptable (hopefully the colors of the html elements as well), one can easily adapt this or create their own admin template (?).
What doesn't really fit in is the button for activating and deactivating the survey. The icon just doesn't match the quality of the others.
I also like the idea that the icons are in a different color (grey) if a function/section is not available for the survey.
I have seen some kind off error on the edges of the boxes (e.g. left top corner above "Administration"). Somehow the border doesn't go all the way to the edge. Strange.
I had hoped that the icons would become slightly smaller in the newever version, but on big screens this might be actually a no go. From my little 13" Notebook screen they look just too big.
But as I said, those are minor ideas for improvement. In general the new icons are really a lot nicer than the old ones. Not that they were ugly or anything. For an open source actually not too bad, but just a little out dated. By the way, who did the icons?
And the other two templates, while overall a little easier to the eye do to some contrasting colors are not really comparable with the new one. And as it seems to be themeable, we might see some quite good themes in the future.