ben, but his is iphone 4..

apptrackr?  You mean the place to add apps?

Well....your friend's issue never happen on my iphone.

ben, apptrackr is the website that have all the cracked apps.  where did you get the apps then?

Normally after you JB your iPhone or iPod, you need to add source from Cydia.  

http://apt9.yellowsn0w.com/, http://repo666.ultrasn0w.com, http://app.weiphone.com/cydia/, www.sinfuliphonerepo.com, http://apt.bigboss.us.com/repofiles/cydia/, http://repo.beyouriphone.com/, http://iphone.gsm.vn, cydia.xsellize.com, iphone.org.hk/apt, cydia.hackulo.us

These are all the sources.  After you add these sources, then you can find lots of apps that you want.

because these sites have some cracked apps.

ben, oh so you install it from cydia? not through itunes?

Well....some basic apps that I always install from cydia.  Like....AppSync for OS 4.0, Install0us, OpenSSH, Source GUI, 3G Unrestrictor cracked and etc.....  Other camera, games, and useful apps....I downloaded them from other sites and install them through itunes.