All comments on the data are now moved to the new space, available under “Data notes” button. 

The Data notes button will show up only when there are comments on the data. You can also see how many notifications of each type there are.

There are four types of information:
Red: critical, Yellow: warning, Green: new features, Gray: others.

After clicking the button, more details will pop up in a new window: 

adreal data notes