this report has been opened here:
"In the tables with columns (or rows) merged with a colour background (ex, red) evince shows lines on each box.
I attach an example created with OOo Calc.
PS: if you open the PDF with Adobe Reader it shows correctly."
Still occurring with poppler 0.20.5.
Still occurring with poppler 0.24.5.
Still occurring with poppler 0.30.0-0ubuntu1
Still occurring with poppler 0.41.0-0ubuntu1.1