When selecting Event as the record type for the Quick Add Portlet, we get the error message:
"You do not have permission to create this type of record. Please choose a different record type."
Perform the following steps to fix the problem:
1. Navigate to Customization > Forms > Entry Forms
2. Edit the preferred case form.
3. Tick the Enable Field Editing on Lists checkbox.
4. Click Save.
When you go back to your Home Dashboard > Quick Add Portlet, you should now be able to select Event as the record type.