Preview.app displays PDFs with missing or distorted text

It is probably using an Adobe font (built into Adobe Reader), and not embedding it in the PDF. So when Preview goes to read it it has to substitute a different font, with different metrics.

 

The thing that you need to understand is that the "PDF standard" is not very standard. Adobe Distiller is the gold standard for producing PDFs. There are other utilities that also do a fantastic job. However, there are utilities that produce crappy PDFs.

Adobe Reader or Adobe Acrobat will properly handle the widest variety of PDFs. However, not even Adobe products can properly handle them all. I have seen Preview handle with ease a PDF that absolutely choked Reader.

Hopefully, someone will see the need to standardize the standard. Until that day, you must do the best you can. Use whichever utility that works to read your PDFs.

 

preview is compatible with probably 99% of pdfs. You can download the regular adobe pdf reader from the adobe site and read those files.