Firefox 4 disappears after user switching

Hi,
This has to be the weirdest software bug I've ever seen. I have firefox 4 (latest) running with about 10 tabs open, I lock the computer using Win+L, when I come back a bit later and unlock the computer, I find that Firefox has completely disappeared.
I check if it was running in the background but not visible, but there is nothing. It completely shutdown down by itself.
This happened 2-3 times already in a couple of days.
When I start firefox again, it shows me that the previous session has crashed and I'm given the option of restoring the crashed session. What is going on here?
Never had this problem with Firefox 3.16.x

Hmmm...
Maybe my eyes just aren't seeing it well enough but it doesn't seem to look like anything is wrong with the pic you posted. Looks good to me.
But if it doesn't work for you, you could always just calibrate the display to your liking and set that as the color profile of choice for your account. From System Preferences go to Displays then Color tab and Calibrate. Name it what you want to at the end.
Good luck!

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