No sooner was Google over a reportedly limited Google Docs security breach this weekend when Gmail started acting up, giving the Google cloud, in particular, and all clouds, in general, another black eye.

Some Gmail users were without service all day Tuesday and that's on the heels of a wider worldwide "denial of service" just a couple of weeks ago.

No wonder this stuff is still in beta.

This time through Google said most of the people affected by the undisclosed bug were back up and running in 30 minutes, but others, a "small subset of users," according to Google, weren't so lucky.

For some reason or another, their accounts may depend on a particular crippled server being fixed.

Google did not explain what triggered the lock-out. There are supposed to be 113 million people using Gmail; one wonders what a "small subset" is.