- The new Options dialog is much easier to use IMHO. It doesn't add much to the product but there's nothing wrong with a bit of polish and attention to detail.
- Support for Mercurial (Hg). I have been using this today without any problems.
- Revamped Projects view. I'm not a massive fan of anything that leads to a dependency on a .pro.user file but the new Projects page is much easier to use than previous releases.
- The new Build/Target button is pretty smart and really useful when you have multiple projects loaded. Ctrl+T pops it up for those of us who are keyboard-centric.
- You can now right-click on a project file and open it using the 'System Editor' (i.e. the application registered for the selected file extension) which I will be using a lot.
- You can finally set the default projects directory.
- On Windows, Ctrl+W no longer closes the current file - this has now been changed to the 'standard' Ctrl+F4 keystroke instead. I found this annoying and can hopefully restore Ctrl+W using the keyboard mappings editor.
- The Output view has been removed. I am in two minds as to whether this was a good idea.
- You cannot make a project active by right-clicking on it - you have to use the new Build/Run Target Selector.
- I cannot get the Mercurial commit keystroke to work (Alt+H, Alt+C). Alt+H opens the Help menu. I must be missing something here.
- When you are editing a .ui file, the new Design view is enabled. If you switch back to the Edit view, the XML .ui file is displayed in read-only mode. I'm not sure if this is desirable.
- Shadow builds are enabled by default which confused me for a little while ("Where the hell's my bloody executable?"). I'm actually on the fence about shadow builds - I'm only doing desktop development so aren't sure if they are of much use to me. Plus I can't find a really good overview of the advantages of using them.
Overall I do prefer it to 1.3 and as I've come to expect from Nokia, it's rock solid.
I'll post a more detailed review when the final version ships (which I'm betting won't be long.)