I have used Picasa for years and love it. But very recently, I did two things to upgrade Gmail security: 1) Activated two-step verification. I then used an app-specific password for Picasa desktop, and was subsequently able to log in to web albums fine. 2) Then changed Gmail password. Since then, I *cannot* log in to web albums from Picasa desktop. I tried entering another app-specific password, but then still couldn't log in with new Gmail password. I don't know what combination of two-step and new password is causing the problem, and I certainly cannot fix it.