From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030703
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. have a png/jpg/picture-whatever-format with a # in its name.
2. open a nautilus window.
3. double click on the picture in the nautilus window.
Actual Results: a Window popup saying file /path/to/fileblabla not found
(original filename was /path/to/fileblabla#blabla.png)
I've tested with some other file type (mp3) and the viewer (totem) worked correctly.
Initial discussion on the upstream bug at gnome suggests that
nautilus 2.4.1 no longer has this problem.