So far IntelliJ IDEA has been running without problems on JDK6. I didn’t notice major improvements, but I guess Idea’s sometimes troublesome performance issues got eased to some extent. However, one must disable the Java version check by setting idea.no.jdk.check=true in $IDEA_HOME/bin/idea.properties.
A nice article with additional extras like adding a JDK6 splash screen can be found at the official IDEA blog.


