Google account sign in problems Yesterday my HTC Tattoo (with software based on Donut) started giving me "No connection Retry" errors for Gmail, YouTube, Google Reader, Market and anything else that requires sign in with Google credentials.

After doing a "Clear data" on the Gmail app I get another message,


  There was a network error while trying to sign in to xxxxxx@gmail.com. Retry now or press the back button to cancel


Whatever "network error" there is, does not stop me from using the web browser. Indeed I am able to logon to the mobile (and unfortunately buggy) Gmail web app from the browser. I will note that I get "Security warnings" about the certificate for google.com.au: "the name of the site does not match the name of the certificate" when I logon via the web, although I saw that message months back and have been able to use my apps until now.

Any idea what could have triggered this? I've not changed my google account credentials, or switched SIM card, or done anything that I think could make it my fault.
I've the exact same issue on a Galaxy Tab P1000 with gingerbread 2.3.3 since about 2-3 weeks.
My current interpretation is that Google has updated its certs (the current one I get is dated 11/7) and the new ones are not trusted by Android anymore making it impossible to use any google account for mail/play store/etc... If this is the case, the only solution would be an update from the manufacturer or maybe rooting the device and convincing it that the new cert is good.