Whether on Firefox, Chrome, Safari, and making sure not to include any extensions or plug-ins, I’ve also tried to open the PDF in a New Private Window, and clearing the cache, and disabling all plug-ins; they are all behaving the same; the graphics in the PDF are still looking blurred. The resolution is 1080 × 13071 which is way less than Dropbox' limit.
As a designer of long scrolling newsletters and webpages filled with graphics, I'm afraid I'm not able to share my work with my clients for their review. It's quite an inconvenience.
Is anyone experiencing the same?