Last modified: 2014-06-30 23:59:54 UTC
At https://en.wikipedia.org/w/index.php?title=Flight_endurance_record&oldid=571122193#Free_Balloon.2C_Manned the table begins with an empty row where there would normally be a header: {|class="wikitable" |- |- |content In view mode this empty line is not shown, but it does appear in VE. Testing at https://en.wikipedia.org/w/index.php?title=User:Thryduulf/sandbox&oldid=571124234#Tables_with_empty_rows shows that the same thing happens, wherever the blank line is in the table. Oddly though the line is shown at full height when its in last position but ~half height elsewhere. In itself this isn't a problem, it's just different to what happens in view mode where the second |- is ignored.
This was fixed a while ago by the Parsoid team.