I thought that I would make a brief post to let me people know that there is a serious bug using the Flotsam XmlRpcGroups module (which allows groups usage with OpenSimulator) and OpenSimulator versions 0.7.0.1 and 0.7.0.2. These problems have hopefully been addressed in OpenSim development code (by commit b1ab3ea on Friday September 17th). A fix has also been put in the OpenSim Git 0.7-post-fixes branch.
OpenSim release 0.6.9 and the 0.6.9-post-fixes branch should be unaffected.
Unfortunately, Flotsam XmlRpcGroups is not maintained very much right now – I made some recent changes that should fix certain problems though I don’t have time to do much with it beyond getting it working for my own work. It also doesn’t help that the setup instructions in the development OpenSim.ini.example are currently badly mangled.
As an alternative, people might want to look at the SimianGrid support for groups (though I think this involves converting to SimianGrid wholesale instead of using the ROBUST grid service backend bundled with Opensimulator). I can’t vouch for how good the instructions are but it might be worth a try.