Another program I have that is based on Java had the same problem. When I updated that program to work with Java 8.131, the problem went away. BUt i do not see any updates for ProjectLibre.
Thanks for the suggestion Alan. Updating to 5.4 fixed Jedit.
toolbar and client areas repeating and offset
menu and other window elements randomly overlapping
menu and other window elelments randomly overlapping
OK, Since there has been no answer to this anonymous post in TWO YEARS, I too want info on Java 8 with ProjectLibre and I am not anonymous and I am havnig problems that might be related to Java 8..