If you are using plugins like Cae_KeyboardEffects or any that lets you assign common events etc to keyboard keys and you have shift assigned it may conflict with the plugin so if that happens check your other plugins before posting a bug report. Any bugs you find comment them here and I will update and fix it as soon as possible. If a new feature or change is requested enough I will also update it. The code is open for you to also modify it however you see fit, use it however you want. No credit or purchase needed.