After using your awesome plugin for a long time with Eclipse Mars.1, I upgraded (Eclipse-internal-update) to Mars.2. Since this time the tiny workspace label does no longer stay(!) on top of the eclipse logo on the Mac OS dock. In other words: after showing up for a moment it vanishes.
I uninstalled the eclipse-launcher and re-installed it - no change.
Is there any workaround?

Confirmed: Same problem for my colleage right after updating to Mars.2.