Google Analytics is showing no data from yesterday. At 11:40 CET there are no data available yet.
Acording to what is written here and here, it looks like it is a general failure.
Analytics blog says nothing about it. It is the first time that this has happened (or the first time that I am aware). But it is surprising that Google does not say anything about it.
Someone said that this could be the problem, but I would not be that sure.
I will update this post as soon as I know anything new.
UPDATE: As of 13:05 CET, data from yesterday are been shown again in Google Analytics.
UPDATE 2: Google has posted a little note on the Analytics blog about this issue, which is already solved.