Just wondering and hoping that the dev team is aware of the recent Log4j security issue.
I don't know if Spiral Knights even uses this library, but it has affected a lot of Java applications, including games like Minecraft. To be honest, I'm reluctant to log in without knowing that this issue has been addressed, if applicable.
it seems SK is using java.util.logging (that comes with java, but has fewer features) instead of log4j
this can be verified by putting this line in your extra.txt
-Djava.util.logging.config.file=nonexist.properties
if nonexist.properties does not exist, then the log file projectx.log will be logging anything while playing (so I don't recommend keeping it)
There are some references to log4j in some of the publicly available source code but it looks like the libraries just have support for it and SK is not actually using it.
Also it was a problem they'd have an update for the game they actually care about (Puzzle Pirates)