Are these documents that you are trying to save as a PDF?
Or are they documents that you are trying to download from the web?
What application are you using to view them?
The ones that fail are paperless statements (but only some) that provide two options: PRINT or DOWNLOAD. If I select print and specify Adobe pdf as the printer, or if I select download in pdf format, the results are the same: squiggly lines where ever text should appear.