I too have a Gen 2 GG DA and got a bit concerned when I saw this thread. Took mine apart but could see no visible sign of impending failure, however I did write GG expressing my concern and got a response immediately. FWIW to anyone who is worried like I was, here's their response:
"Hello David,
Thank you for taking the time to email us here at Griot's Garage. This is not a normal occurrence and not something our department was aware of. When using the Random Orbital, you will want to make sure that the bolt for the backing plate is completely tightened before use. Another factor as that when the unit is turned on, you will want to ensure that the pad is flush to the surface in which you are working with as this will also prevent over spray from occurring. [FONT="][/FONT]
If you have any additional questions, please feel free to reply to this email or call our Customer Service Department at (800) 345-5789 6:00 a.m. - 6:00 p.m. PST Monday through Friday, 7:00 a.m. to 4:00 p.m. Saturday.
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Thank you again for your e-mail, and have a great day![FONT="][/FONT]
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[FONT="]Have fun in your garage!"[/FONT]