The contact list was identified as a weak area of Instantbird 0.2. It has been dramatically improved for Instantbird 0.3 which we plan to release next week.
Like most IM clients, Instantbird 0.2 had each contact placed in a group, leading users to organize contacts a bit like files are placed in folders on the disk.
While this seems ok at first, placing contacts inside groups doesn’t work well when thinking of the contact as a person. Don’t you have a friend (group ‘friend’) who is also a coworker (group ‘colleagues’)?
For this reason, with Instantbird 0.3 we replaced the notion of “Groups” with the notion of “Tags” throughout the user interface. While groups used to be containers for your contacts (it was possible to move a contact from one group into another), tags are additional data attached to the contact (you can add or remove tags on a contact, but no longer ‘move’ a contact) and thus a single contact can have multiple tags. To change the tags attached to a contact, use the “Tags…” context menu item of the contact; it shows a list of the existing tags with a check mark next to the tags attached to the selected contact. Checking/unchecking a tag in this list will attach/detach a tag from the contact.