Using jEdit 4.0pre6, JDiffPlugIn 1.3 on Windows 2000.
Start a diff by clicking on Dual Diff using the
PlugIns->JDiff dropdown. Works fine.
Normally I end the diff by using Ctrl-1 to return to
one window. This leaves jEdit in a strange state
where it won't refresh. Minimizing and restoring
blanks the window. Slowly moving the cursor over the
icons causes them to appear. Have to restart jEdit to
clean it up.
If instead, I deselect Dual Diff first before using
Ctrl-1, then it refreshes as expected.