mouse/touchpad: fix sensitivity settings (shouldn't be inverted... should be described as motion-threshold or even better, as what they actually do). Also, add a way to reset their value.
sound: add an option to switch sound to HDMI when an HDMI output device is plugged
hidpi issues: top of mint menu is cut off in HiDPI (1920×1280)
gnome-system-monitor moves out of place in Expo
when battery is very low, battery icon isn't red.. 2% charge, with less than 5 minutes to go, still not red.. bar is red in CCC, icon is red in notification.. but not in applet (and also not in the CCC icon itself either)
When using Cinnamon bar at top, and secondary monitor with higher height than the main display, some apps like KDE Apps (Krita, Kdenlive) or Wine Based Apps (teamviewer) will display menus from toolbar in the wrong place. Being more specific: The menus will be displayed in the position that they should be displayed at main monitor, however in this case the window is maximized in the secondary monitor.
accessibility: ability to select files by hovering them
multi-monitor: caja doesn't always show the desktop on the primary monitor (using a laptop as main/left monitor, and HDMI screen with higher res on the right, it surprisingly ends up showing icons on the right screen)
consider accompanying the user and hinting at things he/she might want to do (codecs, popular settings, popular apps etc..) - check chalet OS' startpoint ideas
upstream apps using GTK2: Banshee, Gimp, Hexchat, VLC, Pidgin, Tomboy.
mint projects using GTK2: mdmsetup, mintinstall, mintsources, gksu, cinnamon's mount dialog (seen when asking for a password for an encrypted external HDD).
mintlocale: fixed-size flag icons
mintupload: use icon names rather than path to SVG
bashrc: # colored GCC warnings and errors --> export GCC_COLORS='error=01;31:warning=01;35:note=01;36:caret=01;32:locus=01:quote=01' (won't work until gcc 4.9)