#1 Characters written when a non-write node

[alberto Sáez]

When an user writes into a non-writing node (a node
which can't content PCDATA), nothing happends.

For example, it's very easy to posicionate the cursos
into a a cell node.

As this is very annoying for new users, this behaviour
should be solved:

A possible solution should be move the 'cursor' into
the first PCDATA node.