Bots that aren't removed
This isn't a crucial problem but when I have two computers running the client at the same time bots that should be retired aren't removed.
I usually restart robocode client to get updated list from the wiki. Otherwise it takes several hours to stop running battles with retired bots. I think it improved in the latest version of robocode, but littlerumble server does not accept this version yet.
I’m running roborumble on 3 computers/servers, and restarting them manually all the time is already annoying. Once we migrate to the newest version of roborumble, running roborumbe as a service may be eaiser, and I could run roborumble on even more servers (50+ roborumbe clients in total!).