Let me first just say: this is a really silly issue, and probably low priority, but I suspect that its presence might imply other more important problems. Using the most recent as of 2014-08-31 versions of both the Mac and Android clients. Android 4.4.4, osx 10.9.2 Steps: 1) Create a text file on the phone with the emoji for "cookie" in the title. 2) sync that directory 3) mac client crashes upon trying to sync 4) Delete cookie text file. Mac client syncs fine without crashing. I have not tested this with emoji other than cookie, as I'm currently at work and can't deal with multiple crashes right now. But I just had to be the one to report this ridiculous issue. Thanks for the great work, folks. BT Sync is fantastic.