I will try the upgrade to VM 2.6 because I have issues with customer registrations. I am using the VM registration form but when the customer receives the registration details with link for activation nothing happens because the activation of the account should be done by the admin. This is good but the admin doesn't receive email with link to approve the customer, and if this is done by the Joomla User administration the customer doesn't receive email that he was approved. I hope that VM 2.6 has taken care about this issue because there were talks about this on their forum.