本在平台、JDT、插件开发以及Equinox 等方面做了改变以及修正了bug。
整理一下这些变化主要包括如下几个方面：
平台方面：
Declarative services added to the platform
JFace dialog button order on GTK+
Multi-instance Properties view
Workspaces preference page
Extensible installation details
Changes in install new software
Installation information now appears in About
User-named software sites
Double-click on folding line collapses the folding region
Compare Editor enhancement
Next/Previous navigation in Debug view
SWT的改进
StyledText margin spacing and color
Disabling Javascript
Browser wants a cookie
Authentication listener
Alternate button order
Shell modified state hint
DateTime DROP_DOWN
JDT方面
Emphasized matching characters in Open Type dialog
Sort working sets in Package Explorer
Open Implementation hyperlink
Compiler compliance follows execution environment
插件开发
Target platform
Export source bundles
Declarative services tooling
Fragments in the Plug-in Registry view
Keypass support
Build integration with p2
Feature rootfile artifacts
Qualifier replacement on .product files
Equinox
Enhanced DebugOptions
New tracing API
OSGi Declarative Services Changes
详细的每个改变的内容请看
http://download.eclipse.org/eclipse/downloads/drops/S-3.5M6-200903130100/eclipse-news-M6.html
下载地址：http://eclipse.org/eclipse/downloads/index.php
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