Crapola. Yeah, doing a replace on IpAddress.toString() would work, I'll get this in.
Thanks for catching this.
Ok, done - make sure you use BuddyManager.getGroupNameFromAddress() to generate a group name from the Address of a data owner. Centralises this so we can change the format easily in future, if need be.
Also see JBCACHE-644 which is related.