When I open .pdf documents from my insurance company using Adobe Reader, there are thin white gridlines that run through the entire document, cutting off text and making the document difficult to read. At first I thought it had something to do with how my insurance company created the .pdfs, but I have tried opening the same document via Foxit and I don't have the same issue as when using Adobe Reader. If I try printing the document, the lines remain and if I zoom in there is no change either (the lines stay proportional depending on how much you are zoomed in). I have gone through many of the preferences thinking that it might be a rendering issue, but with no luck. Anyone else have any ideas? I have tried uninstalling and reinstalling Reader twice with no effect.