On Behalf of an Organisation profile fields included in a contribution page which include a checkbox don't display

Hi

Just noticed that in certain circumstances checkbox fields don't appear but the label does (tested on Drupal demo 4.3.4).

The circumstances are;

• Create a custom field for organisations - multiple choice field using checkbox. Set a value for 'Options Per Line'
• Add this to a Profile (I added this to the reserved profile On Behalf of Organization)
• Create a contribution page and select 'Allow individuals to contribute and / or signup for membership on behalf of an organization? '
• Choose the On Behalf of Organization profile for the Organization data
• If you now look at the live contribution page the checkbox fields are missing.
• If you go back to the custom field and delete any value for 'Options Per Line' and then refresh the contribution page the checkbox options now appear.

Any value for Options Per Line means that the field doesn't display properly.
I've had a look at what is happening but I can't see what the issue is.

Oliver