The original user of our system who found this problem has come back with more information that may be helpful in determining the problem.

 

It's not actually happening just on PDF files, but on any file that's size is over 200 kB. I only noticed it on PDF's because the ones I was uploading were all over 200 kB, but when I uploaded a txt file it was usually very small.

 

I have been able to reproduce the problem with other file types, if they are over 200kB and have a semi colon.

 

Cheers,

Chris