A. System Description
Description: Ubuntu 13.10
Release: 13.10
nautilus:
  Installed: 1:3.8.2-0ubuntu2.2
  Candidate: 1:3.8.2-0ubuntu2.2
  Version table:
 *** 1:3.8.2-0ubuntu2.2 0
        500 http://archive.ubuntu.com/ubuntu/ saucy-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1:3.8.2-0ubuntu2 0
        500 http://archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages

B. Bug
1. Reproduce
- Open nautilus
- Go to a deep directory structure (location which produce long address)
- Move the mouse to the button with left arrow on breadcrumb (to navigate up level location)
NOTE : Just hover on it, not clicking.
- If you're lucky, the breadcrumb will display between previous (part which is hidden on the left) and current display.

2. What you expected to happen
- Nothing happened

3. What happened instead
- It is vibrating annoyingly makes difficult to navigate.

4. Factor
- I think this is related to the length of location address and nautilus width. A correct combination can produce this.

Will add the picture (maybe hard to get, its moving though), when it happened again.