I have found over the past week+ (it could have been considerably longer but I suspect it was just the past week or so) I have had annoying problem occur where I can load a remote file using rmate and can edit it and even save it without complaint but the save operation apparently doesn't work. This is happening in an environment where I've used rmate successfully for some time and I don't think I've changed anything other than accepting the TM 2.0 updates.