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There are actually 2 problems. 1. more serious If the JAVA_HOME env. variable is not set in OS the internal Tomcat is not able to be started even if the IDE is started with the -jdkhome switch. The error message appears in output window : The JAVA_HOME variable is not set. 2. less serious The Tomcat might run under different version of JDK than IDE - the user can be confused.
not critical for 3.6, there is an easy work around (set the JAVA_HOME variable).
This issue seems to be already fixed.
Verified.