Alt-Tab looses focus and have to hit Alt-Grave Accent to get focus

I have ubuntu 12.4 with Unity window manager.

I have a gvim window and a firefox window open.

I hit Alt-Tab to switch between the two. Sometimes the gvim window doesn't have focus and I have to hit Alt-GraveAccent (Alt-`) to get the gvim window to have focus (ie: have the cursor a solid white square instead of a outline of a square)

I do this to move between firefox where I highlight some text and do a copy, then Alt-Tab to gvim and do a paste. Sometimes the focus isn't in gvim and the paste doesn't work. I then have to do an Alt-graveAccent to get the focus into gvim or click the gvim window.

These extra steps slow my process down and it makes it difficult to get into a smooth rythum.

I saw this: ALT+TAB loses focus

Maybe the Alt-GraveAccent may help someone.

It's a unity bug:

https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1035628

Your best bet is to wait until an update comes through fixing it.