I see that the Legends for the charts that gets generated when you make a pdf are fonts withs serifs. These fonts are rendering poorly.
Before we patched to version SP3 (12.1) they were Sans-Serifs but now with separate legend set to True, they are with serifs.
Are there any settings / fixes to alter this?
Please check if you have ARIALUNI.TTF (Arial Unicode MS Regular) file in C:\Windows\Fonts\
It should be visible on the server and the client machine. Did you try to create pdf report from different client machine?