On my 3G I had about 15 invisible unnamed icons. Thankfully, they showed up on about the 3rd or 4th page of apps, so I never was bothered that much by them. If I deleted them, they would be back within 24 hours. I figured there was some problem with the OS and I'd be fine when I got my new iPhone 4. WRONG. My iPhone 4 too shows these invisible icons, except they are now semi-transparent black squares (obviously they always were, I just never could tell with a black background.) I am very confused because I don't understand what the problem could be. I went through my apps on my Mac and deleted every one that I don't regularly use, but the invisible apps stil appear. What should I do?