Maintainers for marble are Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>.
You may want to refer to the following packages that are part of the same source: blinken, indi, kalgebra, kalzium, kalzium-data, kanagram, kbruch, kdeedu, kdeedu-data, kdeedu-dbg, kdeedu-doc-html, kdeedu-kvtml-data, keduca, kgeography, kgeography-data, khangman, kig, kiten, klatin, klettres, klettres-data, kmplot, kpercentage, kstars, kstars-data, ktouch, kturtle, kverbos, kvoctrain, kwordquiz, libkdeedu-dev, libkdeedu3, libkdeedu4, libkiten-dev, libkiten1, libkiten4, libmarble-dev, libmarble4, marble-data, parley, parley-data, step.
You might like to refer to the marble package page, to the Package Tracking System, or to the source package src:kdeedu's bug page.
If you find a bug not listed here, please report it.