For me it’s a bad habbit. For me the purpose of the icons is to show the function the menuelements are pointing to.
Before I point my mouse over them! To only see some blury, faded-out icons in the menu is to go agains the purpose of the icons.

(The image below is just an example, and this topic isn’t only related to that template.)
An example of the opposite: The bookmarkmenu in Firefox. You see all the (fav)icons clearely and with full colors. Nothing faded or greyish. And when you point your cursor over one menuelement, there’s only a good old blockcolor surrounding both the icon and the text in the menuelement. Clear, simple and visible, and just as beatiful as any menu.
Is it just me, or does someone else also have the same opinion.