Show path for the current message
It's immensely useful to see the path to the current message. This gives a pretty good idea what you are translating, especially when you have a lot of ground to cover. That way, you can get the idea from the source code file name, where you can see that message, so you can open that feature in the application you are translating and see it live, then test your translation etc.
Gtranslator used to show this, the new version doesn't. I'm not sure if this is a design decision or just a temporary solution. Just please know this is important. It makes the translation process a lot easier.
Being able to click and open a text viewer in exactly that location in the source file is also good, but, personally, I can live without that. The lack of showing the path, however, makes navigation more difficult.