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If you don't have Flash installed, that may be the reason why. I had Fliqlo installed on my desktop and when I tried to get it on my MBP, it said it wouldn't work, even though both were running Lion and the desktop worked fine. I finally figured out that I hadn't installed Flash on my MBP yet, and after that it worked.
 
I've got flash. I sent an email to the dev who has designed the screensaver and he sais that he's gonna work on it and see if he can fix it :)
 
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