I cannot paste from jedit into Gnome Terminal either no matter whether Diodon is running or not. On the other hand, jedit to gedit always works.
When selecting a text in jedit and using middle mouse click to paste it into the gnome terminal works well even when Diodon is running.
However it seems that when selecting or copying a text from jedit such item does not appear in the Diodon history.
I cannot paste from jedit into Gnome Terminal either no matter whether Diodon is running or not. On the other hand, jedit to gedit always works.
When selecting a text in jedit and using middle mouse click to paste it into the gnome terminal works well even when Diodon is running.
However it seems that when selecting or copying a text from jedit such item does not appear in the Diodon history.
Therefore marking this bug as confirmed.