Palm OS

I have a very nice customer who purchased a Treo 650 from me. He is a lawyer and people are emailing him constantly. He purchased this device under the impression it would open and read PDF files. He states that in the manual it says it will work. Unfortunatly it doesnt. He along with multiple co-workers of his get an error whenever opening up a PDF file via VersaMail. I logged onto palms website and there was a post saying that users would have to convert the "Native PDF" file, into one the Treo would support. This post was made in 2004 though so Im not sure if they fixed this. Has anyone heard anything like this? Any help?