Here is a list of all interesting features currently available in latest trailr plugin:

• ManualOOX: Trailr compatible groups are late to born, not a big problem: you can still turn "copy & past" into "save & forget" by simply clicking on [!]customize
• OOI: (Our Own Invite) let you invite pictures to one or more of your subscribed groups in a click and with customized per-group invitation code;
• OOS: (Our Own Signature) brings a custom signature of the group where you found the photo when you comment that;
• FRC: (Flickr Refer Comment) let you know where people that visit your photo have found it. That feature has been inherited by Pierre Andrews ​Flickr Refer into Comment plugin
• UA: (Update Alert) reminds you to update the script when a new available version is out;
• ​other stuff is coming

More info? on ​Trailr.info