Version: 2.1.1 (using KDE 4.3.1) Compiler: gcc 4.3.2 OS: Linux Installed from: Gentoo Packages Summary pretty much says it all. You can get around it by renaming the file to not have the '#' char in it. There are likely other characters that would cause this. The id3 tag has '#' in it as well, but that doesn't seem to affect it.
I just ran across this problem and can confirm it. I'm also using 2.1.1
*** This bug has been marked as a duplicate of bug 194889 ***