Recently upgraded from an EPL3 to a GX7--Mostly I love the darn thing, but the frame rate seems to drop precipitously on both the viewfinder and the LCD whenever there is less than ideal light. The EPL3 was smooth regardless of the lighting conditions. I've been searching both on this forum and on the web for common experiences, but I'm not really finding anything (unless I'm just not using the right search terms). A couple questions: 1. Most importantly, is this normal for the GX7? If I have a defective unit, I still am very much in the time period where I can return it if not. 2. If this is normal, is there a setting that can help make the issue better? I found the "shutter speed preview" option (assigned to function 5), and it seems to be doing something, but I can't really tell what...also when it is engaged the text displays on the screen and is rather intrusive.