Bug under OSx10.8

[laurent]

First of all, congratulations and thank you for this wonderful software.
Linux, everything works fine but on the Mac, I have a small problem with the tags:
on the application tags are entered in this form: tag1, tag2, ....
But in the metadata of the image I get this: 't', 'a', 'g', '1 ',', ',' t ',' a ',' g ', '2' .. .

plateform: OSX 10.8.5
Phatch 2.7.1
Field: Iptc_Application2_Keywords

thank you