Tuplets do not move with arrow keys when selected
It is true that for the most part tuples are situated appropriately by default, or if not, changing the above/below is often all that is needed. Nevertheless, it's been noticed that a bracketed tuple number, for example, doesn't jive well with slurs at times and doesn't seem to enact a change of auto-placement of slurs (which in a sense is a bug in itself). The point of mentioning this is, in the mean time, if this occurs, it would be appropriate to be able to utilize the arrow keys on the tuple to avoid collisions, yet the user can not do so as it currently is and must resort to mouse/direct inspector value changes. So in a sense, there are two separate issues here, repeating what was just said:
1) Tuples do not respond to X/Y co-ordinate changes via arrow keys.
2) There are potential clashes of tuples (especially when brackets showing) with slurs that will need (hopefully) to be updated with future improvements of the auto placement algorithms.
And as always: "good luck"