While in SharePoint today I was getting this error when creating new pages:

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The event log contained these details:

Error loading and running event receiver Microsoft.SharePoint.Publishing.PagesListCPVEventReceiver in Microsoft.SharePoint.Publishing, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c. Additional information is below.

: Access is denied. (Exception from HRESULT: 0×80070005 (E_ACCESSDENIED))

“The trial period for this product has expired” and “Access Denied” do not ring the same to me.  Cool error, but I’m not using the trial and my farm account is in the Administrators group for Dev.  Bing & Google yielded a lot of hits, all of them claiming to have the fix.  One article said to disable the logging of the message to the event log.  That didn’t fix the problem. 

This KB article ultimately had the fix, however it wasn’t in the recommended fix; It was in the steps to reproduce:

Steps to reproduce the problem
  1. Create a site collection.
  2. Click Site Actions, and then click Manage Content and Structure.
  3. Click Pages, and then click Edit Properties.
  4. Click Versioning settings.
  5. Under Content Approval, click No.
  6. Under Document Version History, click Create major versions, and then click OK.
  7. Click Site Action, and then click Create Page.
  8. Under Page Title and Description, type a title, and then click Create.

Upon reviewing the Versioning Settings in my MOSS installation I found that the settings were exactly the same as the “Steps to reproduce”.  The solution, in my case, was to turn off Versioning for pages.  I changed the settings as follows (No approval, no versioning)

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This made my problems go away.  Sadly I am not sure exactly how those settings changed or ended up in a state that prevented me from adding pages, but this fixed it and I can now continue on with my dev tasks.