I'm running Xournal built from git master on Ubuntu 13.10. I have GTK 3.8.1.
I'm using Xournal to add text to a PDF. When I select the text tool and click on the PDF, the text cursor doesn't appear right at the mouse cursor - instead it's about 10 pixels below or so. So I actually need to click about 10 pixels above where I actually want the text to be. I can do that, but it's a bit annoying.
Otherwise Xournal is a nice tool!