Sudden Problem with Blackmagic Intensity Shuttle

Has anyone using the Blackmagic Intensity Shuttle on a Mac noticed any recent problems? I've been successfully using mine to deliver a composite SD NTSC video feed into the Video Pod but suddenly it's not working. The device appears to be working fine, and the Blackmagic software can see the cam, so the signal is getting through. The problem appears to be with Flash but I can't locate any issues there either. Am I the only one who's having this problem and, if so, can anyone offer any suggestions?