Eclipse Bug: Unhandled event loop exception No more handles

Question

I\'ve built a GUI using Swing and the MigLayout.

I am using Eclipse 4.2.2 (64-bit) on Windows 7 Ultimate. Every time I click back into the window to edit my code, a

Answer 1

Happens with Eclipse Mars.2 Release (4.5.2) and Multimon TaskBar 2.1 on a dual monitor setup, too. It disappears if MM TaskBar is un-loaded.

UPDATE

Still the same with Oxygen.2 Release (4.7.2).