The column containing checkboxes allowing users to select multiple documents isn't visible on one of my list views. I have the value for Document Library Settings ▶ Edit View ▶ Tabular View set to "Allow individual item checkboxes", but no dice. This isn't affecting any other views of this library.
I found a resolution on the Sharepoint forum at technet:
Did you try to set the view to Basic style.. then reset them back to "Default" ?
My view was already set to "Basic", so I set it to "Default", and now the column with the checkboxes is back.