Good App but with a major flaw

This app is great for magazine reading. I use it all the time. The biggest problem with this app though, is that halfway through reading a PDF file the document will turn up blank.I thought that might PDF files were corrupted but after a while I tried those same PDF files on other readers. Those files were okay on the other readers like perfect reader and stanza. The developer has to fix this as it is the only pdf app that I have used that does this. I would have to restart the app in order to finish the PDF file that I was reading previously. Totally unacceptable!

JamesT780 about PDF Pro 2 - The ultimate PDF app, v2.1