[dev jul 08; observed earlier too] Open the
Options window. Expand <<< column. Choose any
SystemOption; I tried Ant Settings, Output Window,
etc. Change some property (e.g. Verbosity Level,
Font Size, etc.). After a moment the definition
moves into the User column. Click on the empty
circle in the Default column and choose Revert
Default and accept the dialog. After a moment the
def moves back into the Default column. But the
visible property value has not been reverted.
Clicking a different node and back does not help.
Closing and reopening the Options window does not
help. You have to restart NB to see the reverted
property value.

Should somehow fire prop changes from the node,
maybe? Do not know if the actual SystemOption bean
is firing changes, but probably not. Do not know
if it even has the new value if the getters are
called. Guessing that this is a problem with
settings DataObject, but perhaps a Filesystems bug.