I've set up a sandbox at home. ZM runs fine. As a customer I can login order, logout, login,out,in... So I'm logged in. Then I install dual pricing - goes fine - set a product with wholesale and another with multi-level, set myself with different pricing - works fine. Then I logout and log back in - the page goes blank and there I sit.

I've tried to sdiff old vs new but there is just way too much code that's different (version???)

Suggestion? Thanks
Chuck

Any error log files in your /logs folder?

I'm using v1.3.9d - as supplied by hosting company.
No logs but I found a cure. I was going to say fix but not 'fixed' just masked
Was able to create a new customer, logout and back in

includes/modules/pages/login/header_php.php
line 67:

    if (password_needs_rehash($dbPassword, PASSWORD_DEFAULT)) {

$newPassword = zcPassword::getInstance(PHP_VERSION)->updateNotLoggedInCustomerPassword($password, $email_address);

    }

PS: Dual Priceing .... looks like it works as advertised. Great.