Mods- Just to report that I am experiencing the same issues with using the return key that Pat has mentioned several times on this forum.
I am using an iPad. On tapping return, the cursor moves back to the beginning of the post.
However (try it, Pat) I find that I can then place the cursor on the new line where I wanted to be, so it is only an inconvenience, it doesn’t actually stop me beginning a new para.
Will check if my Vista laptop exhibits the same behaviour.