gobby-0.5 Invalid byte sequence in conversion input

I’ve this problem with gobby-0.5 when try to open documents,

marinz@acerone:~$ gobby-0.5 
WARNING: couldn't connect to: /tmp/keyring-ambjS6/pkcs11: File o directory non esistente

(gobby-0.5:3346): glibmm-CRITICAL **: 
unhandled exception (type Glib::Error) in signal handler:
domain: g_convert_error
code  : 1
what  : Invalid byte sequence in conversion input

Segmentation Fault
marinz@acerone:~$ echo $LANG
it_IT.UTF-8

Any ideas ? Thanks

same issue in openSUSE 13.1
gobby version 0.4.94-15.1.4 from repo openSUSE-13.1-Oss

works in compiled from source packages:
http://releases.0x539.de/libinfinity/libinfinity-0.5.5.tar.gz
http://releases.0x539.de/gobby/gobby-0.4.94.tar.gz