Sorry My Engligh no good so i couldn't explain well here is screen shot what i have problem First remove all content in content field then just type This is test and press Enter Key 2 times and repeat it and view HTML Code then you can see ''<div></div>'' and go to Preview Mode there is no Line space I think it will ...

yes there is same problem on your demo site just press enter key few time and veiw HTML source code then you can see ''<div></div><div></div><div></div><div></div>''

Q1 Ver 3.0 when i press Enter Key then ''<div>&nbsp</div> or <p> </p>'' was wrote but Ver 4.0 ''<div></div> or <p></p>'' was wrote  is there any way do i use ''<div>&nbsp</div>'' instead of ''<div></div>'' ?