[flexcoders] Working with null data in a Tree

I have a tree component that has 40 numbers in an array collection. The 36th index is null. (idx 0-35 are numbers, 36 is null, 37-39 are numbers.) The values are equal to the index+1, so index 1=2, and index 35=36. As soon as I hit the null value at idx 36, all values afterward are shown as

[flexcoders] License question - recompile old SDK with one piece of new SDK

I posted this on the Flex SDK forum but it looks like there's not much activity there, so I am re-posting here for a possible solution. This is a question about the legal obligations under the MPL 1.1, under which the 3.5.0.12683 and 3.6.0.16995 have been released. We just migrated to the 3.5