Under Xournal, I add some text to a pdf file, and then I export to a pdf file. In the exported pdf file, the text I added is shown correctly, and selectable, but when I copy and paste the selected text out to a text editor, it is not the same text I added.
For example, under Xournal, I add locking to a pdf file, and in the exported pdf file, when I select the text and copy and paste it into a text editor, the text is PSGOMRK.
I wonder if it is a bug of Xournal?
How can I make the selected text from the exported pdf file the same as the text I added under Xournal?
My OS is Ubuntu 12.04, and the version of Xournal is 0.4.5.

