Same problem as Btrydel, faided text and object no real rhyme or reason. Im using publish in Acad 2013 but the problem has been an issue since at least 2010. Creating and plotting are fine, the problem is viewing in Adobe viewer
Then the PDF works fine and you need to figure out where your monitor and graphics card are giving you the issue.
For me Adobe looked very nice but Foxit is not as attractive on screen. The opposite of what Dean posted I believe.
32" Sharp Aquos thru HDMI connection
1366 x 768 @ 60 Hz
NVIDIA GeForce GTX 560 with DVI output
The PDF that I create using "DWG to PDF.pc3" as the plotter selection comes out readable but not presentable to a client, even at 100% zoom. Once created, the image looks bad on any machine/monitor that I send it to. Other PDF programs work fine, and so does AutoCad LT 2008 with "DWG to PDF.pc3" selection. Just having trouble with 2012 version.