Project: Eclipse_Platform_UI
Bug 318498 Many toolbars on top of one another
Reported: 2010-06-30 12:27:55 | Status: resolved fixed

I don't know how to reproduce this. I'll attach a screenshot.

Files changed in fix:
bundles/org.eclipse.e4.ui.workbench.renderers.swt/src/org/eclipse/e4/ui/workbench/renderers/swt/LazyStackRenderer.java