Incorrect Translation "Properly" in Compatibility page of JavaSE6 Release Note

There is a tittle of section

"5. Java SE 6 Properly Rejects Illegal Casts "

in Compatibility page of Java SE 6 Release Note.
(http://java.sun.com/javase/6/webnotes/compatibility.html)

On the other hand, the Japanese tittle corresponding to the above is,

"5. Java SE 6 no puropatei ga huseina kyasuto wo kyozetsu suru"

However, this seems the statement to which the following English statement is translated,

"5. Java SE 6 **Property** Rejects Illegal Casts "
The title was replaced the correct Japanese phrase.