Can't upload a pdf file.

This is weird.  I’ve uploaded pdf’s before with no problem.

 

I have a .pdf file (size 418 KB).  When I try to upload it, all I get is a while screen and the file doesn̵7;t upload.

 

I don’t believe this is a file size problem, because when I upload the .jpg version of the same file (nearly twice the size), it works fine.

 

Does anyone know how to debug this?

 

Thanks!

 

Jon