I had some renaming issues too, but I thought it was just the behavior of the software. For instance, I might rename a torrent called "trailer" to a torrent called "August Movie Trailers" and that works fine. While battling disk IO issues on one torrent, I noticed that the path on the torrent with an issues was a different case than the other one working. ("W:\downloads\Trailers" worked but "W:\downloads\trailers" was causing disk overload). I know Windows doesn't care about case in the file system, so I thought there might have been some weirdness with my Thecus NAS unit being on a Linux based OS. I went to Advanced on that torrent, reselected the path above and it changed the path to it plus a directory with the name of the torrent (w:\downloads\Trailers\August Movie Trailers\). It did seem like the caching may had been better for that brief moment, but I immediately corrected the directory problem (had to rename torrent temporarily to fix). The paths match now, but the one torrent caused all kinds of grief to get it to finish because of the disk overload. Also, my cache kept going up to 1.6 GB of memory for writing and then the software would hang. It does not always write out the cache for some time (5 to 10 minutes?). Is there any chance this disk overload is a false positive? Why not put a tools section into uTorrent and include a read/write speed tester, so that we can prove to you it is not our external, NAS, or other device with the issue or prove that we have a bad setup? This is just reporting on awkward items that may or may not be a bug. Thanks, cyberfix