OpenMRS "Save Concept" button missing in Add New Concept Page

In OpenMRS version 1.8.3, the "Save Concept" button is missing in Add New Concept Page.

In order to overcome this issue, create/add CATALINA_OPTS environment variable with the value: "-Dorg.apache.el.parser.SKIP_IDENTIFIER_CHECK=true" into your computer.

How to resolve xampp 1.7.7 Tomcat startup issue

When trying to start up tomcat service in xampp 1.7.7 or earlier, it may not be able to startup properly. Following are the message I noticed when trying to execute it:

C:\xampp>"Copy of catalina_start.bat"

[XAMPP]: Searching JDK HOME with reg query ...

Error: The system was unable to find the specified registry key or value
. [XAMPP]: Cannot find current JDK installation!
. [XAMPP]: Cannot set JAVA_HOME. Aborting ...
done.
Press any key to continue . . .