Everytime I open Safari or Mail, they crash at launch and return me to the Springboard. Anyone know how to help?

I uninstalled "Rocky Racoon" in Cydia so that I could unjailbreak my iPod Touch, since it was slow and kept freezing. It runs fine, since I deleted all of the packages I installed myself first (to make sure there was no permanent damage). The only problem is that now, everytime I open Safari or Mail, they immediately crash and send me back to the homescreen. I've downloaded the Google Chrome app as a replacement for now, but I find Safari much more convenient. Anyone know how to fix this?