Author: TomH
[Added to the original trac issue at 2.12pm, Tuesday, 14th February 2012]

The only place that "Jnner" appears in our code is in "vendor/rails-locales/de-AT.yml" which, as you can probably guess is the Austrian translation...

Not sure why you would be seeing it when you have de selected rather than de-AT.

Author: TomH
[Added to the original trac issue at 2.33pm, Tuesday, 14th February 2012]

I'm definitely seeing the same effect as you, which is odd, as it seems to work from the console:

irb(main):010:0> I18n.l(DateTime.now - 1.month, :format => :long, :locale => "de")
=> "Samstag, 14. Januar 2012, 14:32 Uhr"
irb(main):011:0> I18n.l(DateTime.now - 1.month, :format => :long, :locale => "de-AT")
=> "Samstag, 14. Jnner 2012, 14:32 Uhr"

Suspect it must be choosing the wrong locale when matching user language preferences against the available locales.

Author: TomH
[Added to the original trac issue at 2.34pm, Tuesday, 14th February 2012]

That should have been:

irb(main):010:0> I18n.l(DateTime.now - 1.month, :format => :long, :locale => "de")
=> "Samstag, 14. Januar 2012, 14:32 Uhr"
irb(main):011:0> I18n.l(DateTime.now - 1.month, :format => :long, :locale => "de-AT")
=> "Samstag, 14. Jnner 2012, 14:32 Uhr"

Author: TomH
[Added to the original trac issue at 3.40pm, Tuesday, 14th February 2012]

It was indeed a locale selection issue, and it should now be fixed.

Author: TomH
[Added to the original trac issue at 5.57pm, Saturday, 17th March 2012]

Looks like I forgot to actually close this.