The Extension finds that the version of Flash is outdated. There is no means to update this successfully.
Update Flash using the view in the Extensions Display window (Fails)
Manual Update to all browsers in System (Mac OS Mountain Lion) - no change Extension error
Delete .dat file - no change to error
I'm using dynamic values so not too concerned about the preview BUT the problem of the outdated Flash extension seems to jack up the data tab (see screen shot)
Tested on two Macs (Macbook Pro - retina and MacPro ) both with latest OS and latest versions of the extension. Same problems encountered.
Where are you loading the Flash extension? Safari browser iFrame?