Yes, theme support has low priority, but i decided to list some issues so that those won't be forgotten.
1. Plugins window: plugin name is black, and hard to see on dark gray background.
2. Tools - Pagefile window isn't themed
3. Tools - System - Object manager, Pool table, Running object table aren't themed
4. Tools - Security explorer window isn't themed
5. in toolbar in themed mode there is no difference between enabled and disabled buttons - both have coloured icon (checked it with "show details for all processes"). Non-themed toolbar has grayed out icons when disabled.
6. Dialog "Customize toolbar" isn't themed.