Whenever I try to sync my Tomboy notes with Ubuntu One, I get the following window:

From the non-message presented here I have no idea what do to to troubleshoot this problem. I've tried unistalling and reinstalling the Ubuntu One app and the problem persists. My next option would be to do the same with Tomboy itself, but I'm unsure what will happen to my notes if I do that. Is it a good idea to try reinstalling Tomboy, or is there another way to go about fixing this.
NB: I think this happened when I reinstalled my system without formatting my drive after 10.10 came out, and something was perhaps broken in the process.
 
     
    