Just updated to 2.6.0.0, everything works so far, but i've had issues starting masternodes.
I uploaded new binaries to cloud server and restarted solaris daemon.
$ solaris-cli masternode status
error: {"code":-1,"message":"Masternode not found in the list of available masternodes. Current status: Not capable masternode: Hot node, waiting for remote activation."}
So, i restarted the masternode from the local wallet, but nothing changed, masternode status was the same error.
The solution was to restart the solarisd on cloud server, and WHILE IT LOADS blocks, quickly restart that masternode from local wallet.
I don't know, if this is something worthy, but just in case someone has similar issues - restart masternode's daemon, then quickly start it from local wallet.