I multitask a lot, but lately when I work on another application and return back to InDesign it says the application isn't responding. I'm using CS5.5 on my Mac running Mac OS X. Illustrator also does this to me, but not as often.
Which OS X do you use?
i have the same, but cleaning pram might help,restart with cmd-alr-p-r pressed untill you hear apple restart tone. Keep m pressed until you heard it three times.
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