I have recently started having a problem when I upload PDFs to my website.
I can upload the PDF fine and WordPress generates the link, etc but when I copy and paste the provided link it does not appear on the page. The link is vaild and the PDF uploaded without any errors.
Now, if I reupload the same file, WordPress informs me of the conflict and renames the file with (_1.pdf). I can then copy and paste the link fine in a page.
I can also replace the (_1.pdf) filename with the original and it now works.
Any suggestions would be greatly appreciated.