Bitcoin Forum

why in my connected client list appears to version 0.10.99?
this version actually exists?
I'm using the "last" which is 0.10.2...

I think x.y.99 means that someone built their own version of the client. 

To clarify, he means someone built a version of the source from the master branch.
(If they build a version from the 0.10 branch instead of master, it will say 0.10.2 unless they modify the version themselves.)

x.y.99 reflects is the current 'master' branch from the repository: master is typically the last minor before the next major version. Since the next major version will be 0.11, the current master branch version is 0.10.99.

This does produce a couple small considerations however:
All you know from a client saying 0.10.99 is that it was built sometime between 10.0 and the current code on the master tree. It is not necessarily the current master branch, just likely a version sometime since 0.10. It also may or may not have modifications to the core client's code as well(Equally, nothing says that just because a client claims its 0.10.2 that it hasn't been modified either).

Out of 6069 Full Nodes, 165 are currently running "version" 0.10.99 and 51 running 0.9.99.

Where can you download this new release since it's not official ??? ?

If you download the source from the master branch and compile it: https://github.com/bitcoin/bitcoin

Most of those nodes are ARM based servers, as there are no official binaries for Arm. So people with Arm cpus git clone master and build that.

v 0.x.99 ou v0.01 ... are product for nodes of farm miners or services (like bitcoin nodes feature site). ;)