On our user register page, using your add-on, we have a set of checkboxes for 'I am interested in:'
Everything work fine on submittal - except that every checkbox, even if unchecked, is serialized for that profile field.
So the result is, on a profile page, for example - I am interested in: Sports,,,,
I believe the extra commas are due to unselected checkboxes being saved as empty values.
How can we avoid this? Thx.