Comment 7 for bug 959447

Per ralsina, this actually occurs due to non-ascii. added file 優柔不断な人_ñandú.txt to one of the special folders and tested according to

[Test Case]
0. Place files with utf8-invalid file names inside the ~/Documents, ~/Music, or ~/Pictures folders for example, which is not synchronized to Ubuntu One.
1. Ensure the local user account is not connected to an Ubuntu One account yet.
2. Run ubuntuone-control-panel-qt and create a new account, or log into an existing account.
3. When stepping through the resulting wizard, and arriving on the "Computer to Cloud" page, the above UnicodeDecodeError should occur, without this fix. With
the fix, size calculation of the local special folders should succeed without problem.