I just purchased an app called Document Writer-Tex Document Editor and downloaded it. It is a text editor that typesets documents using the typesetting program LaTex. It looks like a great app with a lot if features, but it has some pretty glaring problems. After typing in your document you have to compile (or typeset) it, but there seems to be no control allowing you to do this. There is a help button, but it doesn't work. I went back to the app store to post comments, but when it asks me to input my Apple ID and I do, it thinks for a minute or so then asks for my ID again (no statement about incorrect ID or anything like that, just a mindless "enter your Apple ID"). While doing this, I noticed that there is one other review where the reviewer had identical problems. The app costs $4.99, so it is not a cheap app. I have looked at both the iPad app store and at the Apple web site and can't find a clue as to how to report problems with apps---or, for that matter, problems with the App Store app itself. Any suggestions? I suppose I can always call Apple, but thought one of you guys might have a quicker solution before I "go on hold"! Thanks.