UPDATE: better way of doing this in the comments!
Hello all!
I do pretty things to my paragraphs, so I hand-code up my HTML in the editor rather than using rich text, putting P tags round my paragraphs. However, DW will still automatically add BR tags between them - making the gaps between my paragraphs HUGE and unsightly
The fix for this sets the height of BR as nothing - making the reading experience far more sightly. Put it in your Customise CSS section.
.entry-content br {
   display: block;
   margin: 0 0;
}
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