The stock app launcher in my game has duplicate buttons for the contracts, and KSPedia. The extra contract button does nothing, but the extra KSPedia button works as expected. These buttons show up in all scenes. I have a pretty heavily modded install, but the issue did not start(or at least was not noticed) until after a power outage caused my computer to restart just I was attempting to do a simulated launch with KRASH.
my log file is here https://www.dropbox.com/s/dvj696qjayba9fb/output_log.txt?dl=0