Hello everyone. I bought a Casio Exilim EX-Z90 from ebay. Everything on it works great. I'm extremely happy for it since I only paid $52 for it. One issue I found though is that when recording in 720p the audio cuts off at about 20 seconds. However the video does not. I have heard of other people having this issue but have found no fix for it or why this happens. I have 3 different SD cards and have tried them all making me think its the camera. Does anyone have this problem or have a solution to it? Thanks in advance.