On Logics transport window, four small gray buttons, between the locator display area, and the tempo display have gone?
The bottom two of these were aligned just to the right of the two locator points.
The upper of these took the SPL to the left locator, when pressed.
The lower button took the SPL to the right locator.
The topmost of these four buttons opened the Marker list window!
This primary feature was with Logic from the start and as recent as Logic Pro 6!
What update removes functions?
It has been said, that this feature may return as an update, which is great for new Logic users who have no idea it existed in the first place!
Tell Apple here: http://www.apple.com/feedback/logic.html