The April (3.3) release included an issue affecting JavaScript under certain conditions which could lead to pages not scrolling or being editable for authenticated users.

We're planning to deploy a hotfix tonight (Thursday 18th Apr) between 6-8pm (PST) which will impact availability for approximately 30-60 seconds (IIS reset). 

If this isn't convenient or you'd like to schedule an alternative update time please let us know. The issue is server and performance specific and does not affect all SharePoint environments so was not discovered during testing. Never the less we want to ensure users are not experiencing this issue.

More Information

If you've chosen to deploy updates automatically your environment will be updated on the third Tuesday of the month. If not let us know if you’d like to opt-in for a given month. For more information on this process please see our original notice