Guys, there is a known issue which happens when you remove your SD card to download photos to your PC. When you reinsert the card back into your X10, sometimes (or maybe everytime?) it will cause the camera to start lagging. That's because some files are written onto card during the download. One workaround for now is to set your card to "lock" before inserting it into your PC's cardreader. I'm using this method now to avoid lagging. Else you'll have to reformat your card everytime you download.