I'm using 3.23, the latest version. On all my registrations I'm getting the following whether you click on the link or copy and paste it into a browser: An Error has occured Incorrect link - make sure you copy link from your email client correctly
Part of this problem may have to do with suppression of duplicate registrations thanks to multiple clicks if the system doesn't react quickly enough. I've already experienced one lagging page. There needs to be some suppression of this as soon as possible.