First an easy one could the attachment syntax [+-]sel:attachment be added in v1.8.8, and any other missing options be added to the Changing default track selection thread so all the info is nicely in one place

Now the hard one; selecting the 3d track seems a little odd, possibly broken or a documentation issue, as the following I believe should result in the 3d track being selected:
Code: Select all
-sel:all,+sel:(favlang|nolang),-sel:havemulti,=100:all,-10:favlang
Code: Select all
-sel:all,+sel:(favlang|nolang),-sel:havemulti,=100:all,-10:favlang,+sel:mvcvideo