Board Thread:Questions and Answers/@comment-25161059-20140713221022/@comment-24577221-20140714024157

Red Barn wrote: Punctdan has written about it... it's got problems concerning Friends and such and different servers so you don't know if the friend you invited is the same one; if they happened to have the same name, it could be a complete stranger. Lately I'm not sure if that's been fixed. The problem is not with the same name but with the same game ID, e.g. 176234BM. The two servers are independent and are both giving out the same game IDs. If you know someone's game ID on one server but try to enter it on the other server, you won't get the person you were expecting.

None of the "Friends" features are working on the Windows version, inlcuding all of the stuff about lighting other people's torches. These things are promised for the (indefinite) future.