1. It seems that .gtkrc-2.0 has the MurrinaNightOrange theme, so the windows should be themed. What package is missing in the image for it to be done?
2. The font size is very small in Mnemosyne. Can it be increased?
3. The problem with window focus seems to have it's root therein that the window doesn't regain the focus automatically when it's maximized: you can experience it when you go to the task switcher and then back to the affected app.
/edit: 4. transmission-qt causes a watchdog reboot.