First off, I have to note the customer PCs at issue are not using "Genuine" M$ products. That said, Internet Explorer 6.0.2800... on Windows XP cannot (any longer?) subscribe email addresses to a Simplenews newsletter via the newsletter block, while Firefox 1.5.0.6 and Opera 9.00 both can. 

Platform: LAMP, Drupal 4.7.2, "simplenews.install,v 1.1.2.1 2006/06/23 14:50:50 driesk" (newest file in release).

I've searched the forums and mailing list archives (http://lists.drupal.org/) and haven't found anything relevant yet. Can anyone suggest a solution or somewhere to start looking for one?

Potentially Related Forum Posts:

• Not Able to Login with Internet Explorer, http://drupal.org/node/19835
• destroy session cookie to prevent multiple domain cookies on session_regenerate (referenced in post above), http://drupal.org/node/60584

Thanks for any help you can offer.

AD Marshall
Canada & Saigon, Vietnam