Just be updated that the KML links (map services), which are created within ArcGIS Manager, can be properly displayed in GE or GE Pro with good refreshing or caching.
But, the network link of KMZ couldn't be created in the cluster hostname (saying PA01). That is, this link of URL only can be created at the active node (either PP10 or PP11). In other word, even though this function at ArcGIS Manager works somehow, it does not support cluster infrastructure & interface.
Inversely, the KMZ links saved from ArcGIS Services Directory, which are created from image services, still do not work at all.
However, the KMZ from ESRI services online like http://imagery.arcgisonline.com/ArcGIS/rest/services/LandsatGLS/FalseColor/ImageServer?f=jsapi work very well. I am wondering if our server (10 with SP1) is not latest release.