I can reproduce this with: $ LANGUAGE=de ./software-center 0ad:i386 and then clicking on "install". With some debug code added I get:
2012-10-08 09:07:52,447 - softwarecenter.backend - WARNING - _on_trans_error: 'UnicodeDecodeError('ascii', 'Transaction failed: Die Paketabh\xc3\xa4ngigkeiten k\xc3\xb6nnen nicht aufgel\xc3\xb6st werden\n', 32, 33, 'ordinal not in range(128)')' '<AptTransaction object at 0x562bdc0 (aptdaemon+client+AptTransaction at 0x2d126e0)>' '0ad:i386'
I can reproduce this with:
$ LANGUAGE=de ./software-center 0ad:i386
and then clicking on "install". With some debug code added I get:
2012-10-08 09:07:52,447 - softwarecenter. backend - WARNING - _on_trans_error: 'UnicodeDecodeE rror('ascii' , 'Transaction failed: Die Paketabh\ xc3\xa4ngigkeit en k\xc3\xb6nnen nicht aufgel\xc3\xb6st werden\n', 32, 33, 'ordinal not in range(128)')' '<AptTransaction object at 0x562bdc0 (aptdaemon+ client+ AptTransaction at 0x2d126e0)>' '0ad:i386'