In some cases, Adobe Reader on Windows will show an error when working with downloaded PDF files. The error message will be something like:
Document could not be saved. There was a problem reading this document (23)
We believe this occurs when opening a PDF in Adobe Reader directly from within your downloaded zip file, without first extracting the zip file or dragging your PDFs out onto your computer.
When you open a zip file on Windows, it opens a new window showing you the contents. You can then double click the individual PDF files you see or drag them out of the window to a different location.
This problem may occur if you double click the PDFs, opening them in Adobe Reader, and then clicking “Save as” or similar to “save” the file somewhere else. Adobe Reader, for a reason we’ve never been able to figure out, sometimes gives the above error when you do this.
There is an easy work around for this problem though: Rather than double clicking PDFs in the initial window that opens up, drag the individual PDF files out onto your desktop or another location. At this point the PDFs are saved outside of the zip file and you should be able to read and print them without taking an extra step to “save” them.
This problem only affects Adobe Reader on Windows. Mac OS X versions are unaffected.