https://bugs.winehq.org/show_bug.cgi?id=51899
--- Comment #2 from O. Nykyforchyn oleh.nyk@gmail.com --- It is not only related to Collins Dictionary. WinEdt 16 bit version
http://ftp.itam.mx/pub/academico/investig/latex/LaTeXWin/winedt16.zip
also has a black background in the text input area. Moreover, when text is scrolled, the background is not cleared, so now lines are drawn over old ones.