Foxit’s remarkable little free PDF reader was always good for documents – better than Adobe’s I reckon – but sometimes choked on drawing PDFs with dense hatch patterns. This was seen as an endless draw/re-draw refresh loop as it struggled to render the line-work.
Since we use DWF for drawings it really didn’t concern me but I’ve found it seems to be fixed in the latest 2.3 update. I’ve tried PDFs up to 40–50mb with very dense hatch patterns and images and they render fine.
Foxit is a free PDF Reader that is a tiny download (2.55mb), loads really fast, doesn’t run updaters that crash or nag me to download unrelated junk software I don’t want. It just views & prints PDFs quickly, which is all I need.