The skins, which are now marked as obsolete, will be removed from the Telerik.Web.UI assembly with the Q2
2008 release. We do not encourage you to use these skins in new web applications any more, however, they will be available for download from our website and you will be free to continue using them.
We carried out a skin survey, which showed that the Mac skin is the least used one. On the other hand, the Default2006 skin is rather old and quite similar to the Telerik skin, so no need to have both. The Telerik skin will be modified and polished for Q2 2008 (for example some green elements will be recolored to fit a greater variety of web application designs) and in our opinion, will successfully replace the Default2006 skin. By the way, some other old skins will be beatified too.
the Telerik team