I previously asked a question about the divider line sticking up above the text in columns. The solution posed:
\setlength\topskip{7pt}
works beautifully, but only if the column is the very first item in the document. All subsequent columns still have the protruding divider line, as in the below example
\documentclass{book}
\usepackage{paracol}
\begin{document}
\setlength{\columnsep}{1em}
\setlength{\columnseprule}{0.4pt}
\setlength\topskip{7pt}
\begin{paracol}{2}
No problem here...
\switchcolumn
Kein Problem hier...
\end{paracol}
But if it's preceeding by text
\setlength{\columnsep}{1em}
\setlength{\columnseprule}{0.4pt}
\setlength\topskip{7pt}
\begin{paracol}{2}
The divider sticks up
\switchcolumn
Dann ragt der Teiler nach oben
\end{paracol}
\vspace{1cm}
\setlength{\columnsep}{1em}
\setlength{\columnseprule}{0.4pt}
\setlength\topskip{7pt}
\begin{paracol}{2}
Same with just space
\switchcolumn
Das Gleiche gilt für den leeren Raum
\end{paracol}
\end{document}

