README.md in github-ds-0.5.0 vs README.md in github-ds-0.5.2

@@ -92,9 +92,11 @@
 # Delete multiple keys at once.
 pp kv.mdel(["foo", "bar"])
 # nil
 ```
 
+Note that due to MySQL's default collation, KV keys are case-insensitive.
+
 ### GitHub::SQL
 
 ```ruby
 # Select, insert, update, delete or whatever you need...
 GitHub::SQL.results <<-SQL