Hi Katya,
I am still having this prob, cant login from on android browser running 2.3.6, still registers a new user but won't allow user to login, strangely if using firefox on the same phone it works!
All adjustments mentioned above have been implemented, but no joy.
As before works on everything else, iphone 4gs, ipad, pc win7, mac 10.8 as web app hosted with appery and my domain, no difference, works also as apk and ios app.
I have clients who like the web app approach because it should cover all platforms,with 1 build, I am hoping there is a solution.
I would also like to know if there is any news on the security aspect of web apps, Max mentioned it may be possible to hide api keys and passwords for example.
I can email you the web app domain @ support with app name if this helps
thanks as always