The following two error messages are used in JspRuntimeLibrary.java, but are missing from org/apache/ jasper/resources/LocalStrings.properties. Google gave me two values that seem to be about right: jsp.error.beans.property.conversion=Unable to convert string \"{0}\" to class \"{1}\" for attribute \"{2}\": {3} sp.error.beans.propertyeditor.notregistered=Property Editor not registered with the PropertyEditorManager
Fixed in SVN for 5.5.x and will be included in 5.5.21 onwards.
PS Thanks for find the correct messages for these!
*** Bug 43316 has been marked as a duplicate of this bug. ***