You what? 'locale not supported in C library'

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1

I just noticed this cryptic message that appeared in my Gnome Terminal session:

tony@Dimension:~> realplay

** (realplay.bin:4928): WARNING **: Invalid cross-device link

(process:4946): Gtk-WARNING **: Locale not supported by C library.
Using the fallback ‘C’ locale.

(firefox:4946): Gdk-WARNING **: locale not supported by C library

Whatever does it mean? What should I do to recover?

2

The messages are cause by firefox. To help you, we need more info:

Which openSUSE version ? ( output of ‘cat /etc/SUSE-release’)
System ? (output of ‘uname -a’)
Gnome version ? (available in any Gnome window)