Earlier this month, Adobe updated its Flash Player to version 11.3, but the upgrade has been a bit of a problem for Firefox users. According to Mozilla's support page, Flash-based videos "may appear black, white or grey and never play" in Firefox since the update. In a Tuesday blog post, Adobe acknowledged the problem and said it was "working closely with Mozilla to narrow down the issue and get it resolved as soon as possible." One culprit might be compatibility...