IPhone :: Cydia Apps - Email

I had trouble with my email app on my iPhone 4 after installing a Cydia app. Trouble is I don't know which one. I uninstalled all the Cydia apps that were removable and the problem was still there (Email app would close immediately when tapping the Reply arrow) I restored and re-jailbroke, losing the nice App Store copy of MiTube that I had, but which didn''t get synced to my computer for some reason. Now MiTube is no longer on the App store..and I have yet to hear any explanation. Anyway, after the restore I installed my Cydia apps again, and after one of these installs..Cyntact, Backgrounder, Infinidock, Infinifolders, 3G Unrestrictor..The email malfunction came back. Again I removed all the apps I had installed since the email stopped working properly and the problem did not go away. This time, in addition to email crashing on reply, I could no longer connect to the App Store (I verified that it was the software on my iPhone 4 by accessing the Appstore from my older iPhone, which still worked). I also tried restting my network settings. That didn't help a bit. So once again I restored my phone and rejailbroke and put everything back except the 5 apps mentioned and all is fine. I'd love to know which of them is causing the problem, but I don't want to attempt installing any of them since it could again result in my having to go through the many hours of restoring, and resyncing all my apps and music and reorganizing the icons into folders, etc. Has anyone else encountered any problems after installing any Cydia apps which would not go away even after the offending app(s) were removed?