Drupal: 6.20
PHP: 5.2.17

When using "More Like This" module with OpenCalais, when node is being created, then
- if I try to save node, a white screen appears; if I attempt to edit the node (it is created anyway), it never appears on front page even if the 'Promote to main page' is set; node is only seen by the user having created it/superuser
- if I click on 'Preview', I get the following message: 'The node has been modified by another user, it can't be saved'.

When I disable OpenCalais, no errors occur; the affected node are edited, saved and displayed as expected.

More Like This: 6.x-1.1