Weird dock behaviour in ML

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See for yourself below. The dock indicator icon for Calendar disappears when calendar is closed (but not quit) and then taken out of focus. Only seems to happen on Calendar from limited experimentation. Apple getting us ready for a full-blown removal of dock indicator icons?

Probably best watched in full screen.

 

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Was looking that. I sometimes suffer it with Safari.

http://forums.macrumors.com/showthread.php?t=1412619

Interesting thread! Definitely seems like this is more a 'feature' than a bug. Not complaining - it seems like a reasonable direction for a desktop OS to be heading in. Might take a bit of adjusting though if the dock lights suddenly become permanently switched off after some future release.

Incidentally, mine are now working as usual again ...