JIRA allows you to add the same label several times as long as the letter-casing is different

Steps to reproduce

• Add a label to a JIRA issue e.g Abc
• Try to add another label to the issue, this time with AbC, again JIRA allows this.
• However, JIRA wont allow you to add a label with the exact same case more than once.

Problem

I wasn't sure if this was better raised as an improvement or as a bug. I decided to raise it as a Minor bug because of the unexpected results that it could cause as explained below:

• This can screw up statistics in a couple of ways as JIRA doesn't always treat each of this labels as unique. A JQL query involving any of this cases (e.g labels = Abc) will return all issues containing either Abc or AbC or ABC or abc. The problem with this is that, in a case where a user tried to create a label abc which he did not intend to be or mean the same as another acronym ABC (especially when he is not aware of that existing label with a seperate casing), the entire data appears to be mixed up when retrieving issues with the label.