We'd like users who own records for a custom object (Projects) to be able to click from the Project record to view the related account. This works perfectly in opportunities, so I'm wondering why it doesn't work from the custom object Project record.
As an example, logging in as a particular user who owns an opportunity, I'm able to click the account name on the opportunity and I am navigated to the account page. However, if I do the same thing on a project record that the same user owns, I get an "insufficient privileges" error message.
I've verified the object permissions. I've also verified that the user doesn't own either account (to confirm that access to the account from the opportunity wasn't due to account ownership). I'm not sure where else to look.