I've been having this issue with my Yahoo! mail on Droid. I can get/send my emails fine using Verizon's 3G network. However, when I switch my connection settings to WiFi, all my messages disappear upon refresh and I get a a message saying: "Connection Error." My other Internet apps (including GMail) work fine on WiFi. After switching back to the 3G network and performing refresh, the Yahoo! Mail reloads all the messages and works fine. I checked this issue on 2 phone sets and on work and home WiFi networks. How do I make the Yahoo! mail work on WiFi connection? Is anybody else having this issue?