I had problems with the most recent update. I wasn't having any of the listed problems until I did the update. I rebooted today and it indicated that an update was ready, so maybe my update glitched yesterday. Anyhow, things are back to normal now and the problem with the image viewer appears to be fixed. I am still having problems with the pdfs that are the picture rather than text type pdfs. (Sorry, I'm not a programmer so I don't remember the correct terminology.)