Same problem since upgrade to 4.3. Get notifications that I have 12, 55, 112, etc emails. Go to email and find maybe one or two emails. Evidently 4.3 can't count the number of emails. and yes, upon the advice of VZW tech, did delete all date and cache in email apps. Then had to reinstall all the email accounts. Did not cure the problem. Though it seems upon investigation related to pop accounts such as Comcast uses. Even not leaving messages on server does not change this behavior. BTW there are too many problems with the VZW version of 4.3 to recommend it to anyone, including the latest have to have geeks. Even the world's best experts can't figure out the problems with this version. And after over three hours with VZW and Samsung support, they know very little. Good luck. Probably going to roll back to 4.1.2 - at least it worked. Although I do like the new email layout better.