When I start linux application under 2 head xinerama monitors I found that menu is working wrongg. I can click on a meny entryes, but then ic close. Several time later I found that on click event goes fine and Java provide this info to menu element, but next time it think that position of screen cursor is on the left/right (depend on how you configure your multi monitor) of click position (click postiton + 2'nd monitor width).
Actually I found 2 workaround
1. click and move mouse and capture non seen "cursor" and point apropriate menu position blindfold.
2. Turn off my second monitor at time when I use your software...
Pls .fix this next release. It's a very usefull feature.