Created attachment 105849 [details]
If you open a .odt file on one computer, sync the folder containing it (and thus the .~lock* file along with it), and try to open that file onto the other computer, you get the "this file is already open by someone else, wanna open it read-only?" dialog, which is great.
Except that the filename is full of %20, as the attached screenshot illustrates.
*** This bug has been marked as a duplicate of bug 59354 ***