It appears that the names of the "x" and "check mark" symbols may be inverted.
Just upgraded from 5.0.0 to 5.0.2 the "X" symbol shows up in the server status for ALL services yet a zmcontrol status shows all services running.
Looking at the Tabs for various functions in Admin. Console instead of the "X" to close the tab I'm seeing a "Check Mark".
I've got a screen shot but the jpg version is having problems uploading.
zmcontrol status provides the following.