debug mode cursor displayed wrong in 3d anaglyph

When using 3d anaglyph in normal mode, the cursor (cross) is rendered as usual. Works fine. But when switching to debug mode with F3, the debug cursor ist shown twice. I dont know if its supposed to appear very close before the eyes, but it doesnt work for me at any distance. I see 2 cursors with the glasses on, too, The real Cursor is in the middle, so its difficult to aim.