I've just update my Pdfnotes program, but its icon in the "open in" menu (from all other programs) become white as well as its icon in "Settings". The icon on the homescreen's fine, though. I just want to know what's causing it. I'm using a 64GB 3G/Wifi iOS 4.3.5 without any jailbreak.

It might be worth deleting the app entirely and then reloading it. You won't have to pay again; the iTunes store keeps a note of all your purchases and, at the final stage as you go through the purchase process iTunes will tell you 'Already purchased'.

This should fix the problem.

Tim

Thanks a lot.
Yep. By reinstalling it, the problem's solved, but all the data in the program will be completely lost. I've updated the app 2 times and have to reinstall it twice after each update. It's not a big deal really, but I am just curious about the cause of the problem. The ipad is brand new and without any jailbreak.

The easiest first way to try to solve ‘unexplained’ or ‘unusual’ problems with the iPad are:-

Force the offending app to close. If you have iOS 4.2 or 4.3 double-press the ‘Home’ button to bring up the multi-task bar at the bottom of the screen. Press *and hold* any icon until they start to ‘jiggle’. Then tap the top left-hand corner of the app that you want to close. It will ‘disappear’ from the list. Don’t panic - you’ve not deleted it, just closed it. Now tap the Home screen and the multi-task bar will disappear. Re-open the iPad’s app and see if the problem has resolved itself. If not, it’s on to possible solution number two!!
Restart the iPad. Press *and hold* the Power button. After a couple of seconds a slider control will appear asking you to confirm that you really want to switch the iPad off (this is all you’ll be doing). Slide the control to accept. A rotating white ‘bezel’ will appear in the iPad screen as the iPad powers down (it takes a few seconds, just like it would if you were shutting down your PC). When the screen of the iPad has gone completely blank, press *and hold* the Power button for a couple of seconds until the white Apple logo appears and the iPad starts to power up. This takes several seconds, so be patient. During the power up the automatic screen orientation function is disabled, so don’t panic. A few seconds before the power up is complete, the iPad plays a little ‘jingle’ and then you’re back to the Home screen. Restart the iPad’s app and see if the problem persists. Apple (and Forum members) recommend that you power down your iPad at least once a week, just as you might regularly completely switch off your PC. The normal procedure of just briefly pressing the Power button of the iPad merely puts it to ‘sleep’. Most Forum members have found that one of the two methods I’ve mentioned here cure a whole bunch of unexplained problems and are an easy first step to resolving most anything that happens on the iPad.

Tim
Scotland

Thank you so much for the advice. I've already tried restart, and close the app for several time, but nothing change. It's like the only way to solve the problem is to reinstall it. I've asked my friends to update the app and no one has the same problem.
What a pity! I switched to Apple because it rarely has bug. Anyway, thanks again for the advice.