I am having problems with the upgrade. My camera now acts very slow thinking about what it just focused on. The focus seems just as fast, but it lingers for a half a second (seems like 20 seconds) before it fires. If I have it on machine gun, it just pauses before the first shutter release, then throws led just like it did before. I used the camera all day Saturday at two zoos and it was fine. I did the upgrade today and ever after it is one slow duck. Any suggestions of what I might be doing wrong would be greatly appreciated.