That's a good one. I'm going to be using this a LOT. Thanks!
Ok guys, help me out here. I've literally just now discovered this behaviour and it's kind of disconcerting as I used to option-click on markers for ages to go to the beginning of the marker. I've been using outboard gear exclusively for a couple of months now so not much arranging in Logic but I couldn't believe my motor memory could have failed me so bad, so had to fire up L9 (first time in years) to make sure I'm not going nuts, and option-clicking markers indeed does what I expect it to do.
I guess this may have been introduced some time around 10.2.1, this support article describes the new behaviour ("Trim the start or end point of a marker"). Now, as much as I appreciate the new stuff Apple introduces in Logic, I'd really like the old behaviour back, but mouse clicks aren't on offer in Key Commands. Any ideas?