secgroup-add-rule and delete-rule handle case differently

$ nova secgroup-add-rule revproxy TCP 8080 8080 0.0.0.0/0
$ nova secgroup-list-rules revproxy
+-------------+-----------+---------+-----------+--------------+
| IP Protocol | From Port | To Port | IP Range | Source Group |
+-------------+-----------+---------+-----------+--------------+
| tcp | 8080 | 8080 | 0.0.0.0/0 | |
+-------------+-----------+---------+-----------+--------------+

$ nova secgroup-delete-rule revproxy TCP 8080 8080 0.0.0.0/0
ERROR: Rule not found

$ nova secgroup-delete-rule revproxy tcp 8080 8080 0.0.0.0/0
$

The ‘TCP’ is case sensitive when removing, but not when adding.

Is there some sort of sanitisation performed by the API server to convert the 'TCP' to lower case, that then means that the base.getId() function is not going to get a match when it compares the db's value to the upper case version provided by user input?