The previous release had some compatibility issues with Java Runtime Environment 5. These issues have been fixed in this release.
If you are going to use Eclipse with JRE5 you should read the following instructions to make Compose*/Java for Eclipse work correctly.
Visit the download section to download the various releases and installation instructions.
First of all, it is strongly advised to use Java Runtime Environment 6 or later. However, there is a case where Eclipse does not work with JRE6. In this case you can fallback to running Eclipse in JRE5.
But to make Compose*/Java work properly you need to take some additional steps. JDK6 is only optional when Eclipse is running in JRE6. This is because in that case Compose*/Java can use the Eclipse JDT Java compiler. This compiler is not available when Eclipse is run in JRE5.