Eclipse Helios - @SuppressWarnings "rawtypes" doesn't work while "unchecked" does

I have a problem with the @SuppressWarnings annotation when handling raw-types warnings in Eclipse Helios.

According to this post and the docs, the annotation parameter rawtypes should be used instead of the old unchecked in Eclipse Helios. However, when I use the rawtypes annotation, I get following warning:

Unhandled warning token rawtypes

Even when performing a quick-fix over a raw type, Eclipse suggests me to use rawtypes. However, I have found out that the old unchecked param开发者_如何学JAVAeter still works in my version of Helios while rawtypes doesn't, which doesn't conform to the docs.

So basically I have already "solved" this issue but the real question is why rawtypes doesn't work?

My Eclipse setup:

Version: Helios Service Release 2
Build id: 20110301-1815

Project setup:

Java Build Path > JRE System Library: jdk1.6.0_24
Java Compiler > JDK Compliance: 1.6
Java Compiler > Generated .class files compatibility: 1.6
Java Compiler > Source compatibility: 1.6

From eclipse.ini:

-vm
c:/Program Files/Java/jdk1.6.0_24/bin
-vmargs
-Dosgi.requiredJavaVersion=1.6
-Xms40m
-Xmx512m

System:

Windows 7 Professional Service Pack 1

Any help or explanation will be much appreciated, thanks!