Seems as if the glue that holds the outer portion of the panel to the Corvette's roof frame has been failing. Full, worst case scenario consequence would be the outer part of the panel separating completely and flying away where it "could strike a following vehicle and cause injury and/or property damage." Seems as if we've heard something about this adhesive problem before... way back in April of 2006.
According to General Motors and the National Highway Traffic Safety Adminstration, all 22,090 2005-2007 removable roof Corvette owners would be well advised to go down to their local dealer and get a new roof, gratis. Also: special bonus props to whomever can name the special edition Corvette pictured above. There are a couple of clues if you look hard enough.
[Source: National Highway Traffic Safety Administration]