Have you read thisviewtopic.php?f=17&t=33561
More context/data reference your hardware/software setup could help..
Look in the keyboard layout of your version of mint that is installed, they are located under different names in different versions, depending on the desktop being used
However, they all are keyboard layouts/selections
--the default installation keyboard is US, you can do some testing and you could also do it with a fonts selection or in a word processor, does it work in those applications/utilities..
Do some keyboard testing in the terminal (Konsole for KDE desktop)
--does lowercase v work there; are you inadvertently activating shift-lock on your keyboard, have you set up any special keyboard mapping, do you use a non generic keyboard, ie arranged for a specific hardware system (HP, Dell etc)