Well, someone else could have reported this, or the developer team could have caught it and fixed it inbetween 10.7.9 and 10.8.1.
I really am quite surprised this has been going on since around 10.7.5/6 (I tested with .6, I think it's also there) and nobody complained much.
But I guess I am in a minority group using Logic with multitimbral instruments, since I work with big orchestral templates and such, so that's what makes most sense.