The Ctrl U WMD shortcut turns the current line in a list item.
The Ctrl Shift U shortcut triggers the unicode input mode.
Ctrl+Shift, Ctrl+Alt keyboard shortcuts in the WMD editor is tagged status-completed. However, the Ctrl+Shift combinations haven't been fixed yet.
Can Ctrl Shift (or at least +U) be remapped to nothing? It's not nice to manually delete the generated lists after using the Unicode input mode.