The 4.0.5 run.bat script has this new piece to check if the JVM supports the -server flag, in order to add it. | rem Add -server to the JVM options, if supported | "%JAVA%" -version 2>&1 | findstr /I hotspot > nul | if not errorlevel == 1 (set JAVA_OPTS=%JAVA_OPTS% -server) | 'findstr' must be on the PATH. It's under windows\system32 on my winxp box. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3982574#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...