I am seeing many "page not found" errors on the log, but the users are not complaining.
I think the errors are coming from a page which contains links to many reference forms that users can download. All the links have urls of the format:
https://www.example.com/system/files/Activities/Forms/sample.docx
The use is able to download sample.docx, but the load shows Page not found at this location
https://www.example.com/system/files/Activities/Forms

It doesn't happen to everyone. I can download documents without any errors.
I'm thinking that this a browser problem or Mac issue or some bad html, but I can't confirm this.
Any help would be appreciated.