Locale settings messed up

[Trey Sizemore]

It would appear that my locale settings are defaulting back to C, at
least for gnome apps. I log in using GDM and set my locale to en _US but
my gnome/gtk apps (specifically mailers like sylpheed and evolution)
default to C when sorting my mail folders (case sensitive) or presenting
date formats for the current locale.

Here's my locale output

trey at salamander~> locale
LANG=en_US.UTF-8
LC_CTYPE="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_ALL=

It appears that the entries presented with quotes (COLLATE) is telling
me there's a problem.

How can I fix this? It's driving me crazy.

Thanks.