This is a new version 6, 7, or 8 install? The help has changed since version 6 which is why I ask. Please be so kind as to take a look at the forum post, getting the most out of your post here:
sagecity.na.sage.com/.../85053


If it is version 7, then is it possible that it only happens when on wifi, as opposed to being plugged into the network directly through a physical Ethernet cable?