Thanks for sharing those. I had a look through the list and tried a couple using Safari 3 (Mac).
#6 is there in my install of 5.0.12 NE. (Note that Shift-C does compose in new window.)
However #14 isn't quite as severe to me. If I hit refresh within Zimbra after printing, the notes reappear even if I've previously saved the (apparently) empty note--unless I type into it before saving. Appears to be Bug 35341 - Appointment loses notes when attempting to print from day view, in the advanced client.