iPhone 4. Sparrow works with Comcast POP3 email, not with Gmail POP3 email. Main computer is Windows 7, so no reference to Mac would apply. Until 3 weeks ago, I was able to use Sparrow with my two gmail accounts just fine. (Using POP and SMTP.) I recently changed my gmail passwords. In Sparrow I try to change settings/password but, whenever I try to Save, I get "Unable to validate account. Connection to gmail could not be established. Your email or your password is not correct." I am sure I am putting in the correct password. To test, I set up the basic iPhone Mail app with POP access to one of my gmail accounts that isn't working in Sparrow. It works fine. I also can get to that gmail account using Safari. Finally, to show Sparrow is ok, I can say that it continues to work normally with a Comcast POP account. Here is another oddity, maybe a clue? If I go into one of my gmail account settings/details, I see POP server with login and pw, and same for SMTP. Updating pw for POP and SMTP gets me that failure noted above. If I go into the other gmail account's settings, I get an Account Configuration screen that only asks for name address and pw. No separation of POP or SMTP. Is there some advanced setup screen I may be missing or some other way to tweak a gmail POP account in Sparrow? I haven't tried uninstalling and reinstalling Sparrow because, as I said, the Comcast email account works fine. So likely nothing wrong with the program.