Description of problem:

 I have some files which use _ and . as characters that are not properly sorted.

Version-Release number of selected component (if applicable):
coreutils-8.10-2.fc15.x86_64
coreutils-libs-8.10-2.fc15.x86_64

How reproducible:
Always

Steps to Reproduce:
1.touch file_1 file.1 file_2 file.2     
2. ls -l
  
Actual results:

-rw-r--r--. 1 cgarcia dmd_df 0 Apr 20 11:43 file_1
-rw-r--r--. 1 cgarcia dmd_df 0 Apr 20 11:43 file.1
-rw-r--r--. 1 cgarcia dmd_df 0 Apr 20 11:43 file_2
-rw-r--r--. 1 cgarcia dmd_df 0 Apr 20 11:43 file.2

Expected results:

 info ls states that "By default, the output is sorted alphabetically, according to the locale settings in effect". I would expect the following output:
-rw-r--r--. 1 cgarcia dmd_df 0 Apr 20 11:43 file_1
-rw-r--r--. 1 cgarcia dmd_df 0 Apr 20 11:43 file_2
-rw-r--r--. 1 cgarcia dmd_df 0 Apr 20 11:43 file.1
-rw-r--r--. 1 cgarcia dmd_df 0 Apr 20 11:43 file.2

Additional info:
# locale
LANG=en_US.UTF-8
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=