How can get rid of white screen of death after Drupal 6 upgrade?
I just upgraded from Drupal 6 to 7... with no errors according to the update.php script. This page is the only one that can display on my site. The homepage is a blank. Forums suggest memory limits may be the issue, but modifying settings.php and .htaccess with memory limit code as prescribed does not fix the problem.
I hope that it's not too late and that this post will help you.