iPad rotation lock in iOS 4.2, is it gone?
Apple has acknowledged the workaround in the knowledgebase:
http://support.apple.com/kb/HT4085
This has caused much consternation, and while the forums do offer user to user help, it generally can be frowned upon, when people rant about issues that no one on the forum has any direct control over. If you desire this feature to be returned to the current mute button, or an easier downgrade path, please submit feedback to:
http://www.apple.com/feedback/
I'm an end user myself, and while I'm not happy about the change, all I can do is inform others how to work around it.
Thank you.
An Apple user since 1981, Mac OS X (10.6.2)