Yes, it's doinking.  Every few minutes at an unknown pattern.  Kind of sounds like the sound gchat makes while in the gmail browser.  There is also (perhaps unrelated) window that pops up, like a warning box shape, but it's so quick I can't tell if it has text on it and what that would say.  There doesn't appear to be any one program running that would cause this in each case.  Thoughts?
	
		
			
		
		
	
				
			