Mac OS not recognizing DVD with Lightroom Active

Has anyone found that a DVD is not recognized by Mac OS when Lightroom is active? Once I load the DVD to export images, it's not in Finder or the desktop. I've checked my DVD preferences in Mac OS and tried "Ask me" or "Open another application (Lightroom)." The only workaround is to kill Lightroom, load the DVD, then reopen Lightroom. Does anyone have a fix for this?

>Does your computer see a blank DVD when inserted with LR active
Yes... Mac Pro w/ Leopard 10.5.2.
Are you running any Western Digital software for external drives? I had a problem with it a version or so ago, and had to uninstall it to make blank media behave properly. Haven't messed with it since and haven't had any problems.

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