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I am randomly losing CMD+V functionality. Is there a shortcut which might trigger this? So that the keyboard goes into some kind of different mode?

I am working with cmd/shift/option a lot in gfx apps, like Illustrator.

I thought, maybe the CMD-key is broken, but this happens with both CMD-keys.

After some time using the system it starts to work again.

I am on Mountain Lion, to which I recently switched, never had this problem prior to Mountain Lion.

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Have you ever created customized shortcuts in the System Preferences? Maybe you have overwritten CMD+V accidently? I know the probability is very low... but maybe? – cyphorious Dec 11 '12 at 13:04
@cyphorious thanks for the tip, but as I said, it seems to be triggered somehow. So paste works most of the time, but sometimes not. I double checked, no custom shortcuts in sysprefs. – owzim Dec 12 '12 at 13:21

I had the same issue, what I found was that using a Software called ShareMouse, and when it crashed, I lost my Cmd+v functionality; I then forced ShareMouse to close, and cmd+v returned.

You may be experiencing this issue with ShareMouse, or some other piece of software.

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