Statutory Access Rights

The Land Reform (Scotland) Act 2003 (which came into force in 2005) gives everyone rights of access over land and inland water throughout Scotland, subject to specific exclusions set out in the Act and as long as they behave responsibly. These rights are sometimes referred to as 'freedom to roam'.

Are access rights different in Scotland from those in England and Wales?
A local landowner has fenced off a path that is well used by local people, and has put up a sign saying No trespassers'. What can I do about it?
Horse riders are using a local path and churning it up so that it is difficult for walkers to use. What can be done?