Thank you for the information. It's strange that after you're closing the Dashboard, that it creates an new instance. It should be the responibility of the operating system to close intended applications.
For more information about the DashboardClient, I found this link that would be a good reference. http://www.macinside.info/process.php?name=DashboardClient
I had luck by simply restarting my Mac, and then installing Adobe Flash after restart.
I agree with dandab. Running 10.8.4 and the ONLY place Dashboard shows at all is through "Mission Control" and I have to open that before I can even access it.
You've got something configured wrong that causes it to relaunch.
I get the same message in Yosemite. And there's no "dashboard client" task running. some "dsb" tasks--is that the mnemonic version (dsb) of DaShBoard? Is Adobe waging war against Macs? Like, you can't download FileMakerPro-Go from the app store, because Mac "has not heard" of FileMaker as a developer of Macintosh software--no, wait a minute, this would be war between APPLE and FileMakerPro, a lowly subsidiary of AppleCor(p).
This may be unrelated, but I get nothing but a solid black box (or screen if I go full-screen) trying to play ComedyCentral Daily Show bits. Looks like the episode is loading, but then the load just freezes--no fade-to-black here--just Leap To Black And Die. boo, hiss.