I am trying to update my webform module from 7.x-3.18 to 7.x-4.0-alpha6 and both a web update and drush updb get stuck in an infinite loop at webform_update_7401. My site has 199 webforms to update. The only way the update stops is if I kill it (after a few hours) or PHP runs out of memory. http://drupal.org/node/1609324 does not mention anything special that I needed to do for the update. Any help will be appreciated!