We're using a custom data group attached to participant records to collect data about our marketing efforts (i.e. how did you hear?). A profile is used to expose the form for online registrations as well. The group has one field with multi-selct checkboxes (i.e email, postcard, facebook, etc.)
The problem is with the even confirmation emails, which fail to display the data correctly. Confirmations for online registrations show the value as "0th, 0 12:00 AM" and those for offline registrations just say "Array". I am especially perplexed that these aren't wrong the same way.
Obviously we could (and did) edit the email templates to simply not display any of this data at all, but I would prefer to get it to work properly for those cases when the field is more important (e.g. menu choice, etc.)
Any suggestions?