If a username has a dot "t.user"…when they login to Share there dashboard does not display correctly.
freemarker.core.InvalidReferenceException - Expression sites is undefined on line 21, column 12 in org/alfresco/components/dashlets/user-welcome.get.html.ftl
That was fixed quite recently, so hasn't been merged to HEAD yet. We're trying to sort out a particular authentication issue on the E3.0 branch, so don't want to merge to HEAD until we've got to the bottom of it.