Previously, when no value was selected, the field was not shown in the profile. Now, it shows the default value.
Publicly display profile field: Yes
Display in user control panel/viewtopic: Yes
Required field: No
Add these 3 entries:
(On the next page "Profile type specific options")
Default value: NONE SELECTED
Option equal to non entered value: NONE SELECTED
NONE SELECTED will now be shown for that field in the user's profile.