I'm having issues on GardenTractorTalk with PDF's no longer being accessible in a couple of threads. Here's an example.

 

http://gardentractortalk.com/forums/topic/19871-mtd-gt-model-production-year-chart/page-1#entry262899

 

Any clue why this would be happening? What other information is required of me to get this issue resolved? 

The first pdf comes up with a something went wrong - has the member deleted the pdf from his attachments ??

The second pdf opens fine for me (talking about post 1)

I hate to sound ignorant, but how would I check that?