I know a few people beside myself have had this problem. Here's the fix Go to applications/mobilemail.app set it to 755 if its not already. Now inside of mobilemail.app change the mobileMail & Pkginfo to 755 and do the same for info.plist Now go to mobile/library/mail change it to 755 inside you should see a folder that looks like your email address change that and envelope & accounts.plist to 755 Now open the folder that looks like your email address and change everything in there to 755 mainly the mboxCache.plist Now go to mail if it still crashes go to prefrences mail and try to erase or create an acount if it dosent crash your gravy. If it does still crash restart you iPod/iPhone. If all els fails change them all to 777 and restart. Hope I helped someone. If I did +REP would be nice.