Operating system and graphics Card
Windows 7 Pro 64 bit, Intel on board grapics
Short description of error
When creating a tree, the number of leaves doesn't change if branch splitting level is 2. With level 3 it works.
Exact steps for others to reproduce the error
Add curve -> Tree -> check "bevel". All of the other settings can remain as they are. Then goto section "Leaves" and check "show leaves". The number of leaves attached to the tree doesn't change if you change the value in the belonging input field. If you go to section "branch splitting" and increase the branch level to 3 then you can set the number of the leaves as you want and they are shown / attached correctly.
(Maybe this is actually a feature but to me it appears like a bug.)