gerrymoth: Are you having rename trouble inside the DropN900 sandbox folder. I just noticed that there is some path bug there when renaming, happens to me especially in the DropN900 app folder when renaming. About uploading/downloading in general. I have not tested very big uploads or downloads im afraid. Biggest might be few megs. The uploading is done via the python-poster lib that should handle big and long streaming uploads well, I suppose the lib was made for this kind of thing. I am still unsure if my threaded networking will give this a performance downgrade tough, I would hope not. I will have to start testing with bigger files on both upload and download. I read at some point from dropbox forums that uploading via the dropbox api would have had a 300mb size limit, I am not sure if this is correct though. You should also understand that the dropbox servers replying to these requests might be jammed at some points in time. The api is just beginning to shape up and they are developing it all the time. Sometimes you might not get any responses from the servers in minutes. Be patient 0.1 software under construction I'll update the first posts goals a bit.