ctrl-home doesn't scroll the score, ctrl-end only if there are several pages
ctrl-home selects the first note, ctrl-end the last one.
If you have several pages and come from the middle of the score, ctrl-end will scroll the score to put the last note (the one just selected) in view (=> this is more than scrolling to the top of the last page, it really puts the bottom of the last page in view).
The bugs are:
-For one page score, ctrl-end doesn't scroll at all (if the last note wasn't in view it stays so)
-For several pages scores and single page as well, ctrl-home never scrolls