Today Qt Software released beta version of Qt 4.5. The release is more stable than the technical preview released two months ago. According to Thiago's post most effort is being put into making Qt run properly on 64bit Macs using Cocoa. As you probably know beta doesn't bring any new features (as those were frozen some time ago) but is a result of a constant effort to increase the quality of the framework.
Apart Cocoa support Qt 4.5 brings many new features such as ODF and XSL-T support, WebKit updated to the latest version (bringing among other things blindlingly fast JavaScript engine), major improvements to Qt's rendering performance, transculent widgets on X11 (finally!), next series of improvements to Qt Designer and many more.
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