beets: chroma tells me that audio could not be decoded

i cant get the chroma plugin working on all my ubuntu unicorn boxes. i have the feeling that i didnt had the problem with the previous beets version. i checked all installed packages named in the doc.

• python-gst0.10-dev
• gstreamer0.10-plugins-good
• gstreamer0.10-plugins-bad
• gstreamer0.10-plugins-ugly

and i even installed libchromaprint-tools to have the fpcalc command. i still get the error:

fingerprinting of '/home/myuser/Musik/Kill Holiday/Somewhere Between the Wrong Is Right/01 Somewhere Between the Wrong Is Right.flac' failed: audio could not be decoded

if i use the fpcalc command on that file… it gives me the fingerprint. so i think that it can be decoded somehow. im pretty stuck with finding the error. anything i could try?

my config:

directory: ~/Musik/beets                                                          
paths:                                                                            
        singleton: Non-Album/$artist/$title                                       
plugins: chroma