Problem with Globbing

I created 2 files:
Code:touch Test.txt test.txtI can list the files:

Code:ls -l
-rw------- 1 user users 20 Nov 6 test.txt
-rw------- 1 user users 20 Nov 6 Test.txtHowever, globbing doesn't seem to work:

Code:ls -l [a-z]*
-rw------- 1 user users 20 Nov 6 test.txt
-rw------- 1 user users 20 Nov 6 Test.txt...but, using the macro, it works:

Code:ls -l [[:lower:]]*
-rw------- 1 user users 20 Nov 6 test.txt
Thoughts?