The WebIssues Client got a new improved UI style on Windows similar to Office 2003. It's based on the QtDotNet Style recently migrated from the Trolltech Labs. There are a few new screenshots demonstrating this new style. There are also some usability improvements in some areas (quick search box, find bar in the issue history) and the user's manual was updated.
Another important change was dropping CMake and switching entirely to qmake. This was possible thanks to the Trolltech's recent decision to add support for Visual Studio to the Qt/Windows Open Source edition. I think this is a very good move and it should encourage more open source developers to support Windows. I also created simple configuration scripts so that compilation should be easy under both Linux and Windows.