It has come to my attention that some (attempted) new users are not receiving the confirmation email.
It would appear that a setting I had not noticed was controlling how many confirmation emails could be sent to new users simultaneously and that setting was too low for the amount of users attempting to register.
If you experienced the problem above please re-register your desired username and be sure to check your spam email box in case the confirmation email is filtered there.
My apologies for this nonsense.
Edit: Should this occur in the future, it is also worth noting that there is an option on the Login page to resend the activation email.