I am using the default email client talking to Exchange. I also have it set to sync my contacts with that account as well. Every few days the email settings disappear and I have to reconfigure the email client again. This has been mentioned often in the droid forums on motorola's site and apparently its a known issue with no fix. While it is annoying, I can live with reconfiguring the mail client but the really annoying part is that all my pictures that I have attached to contacts are gone and I have to go through and set them all up again. So it there any way to backup the images attached to contacts so when I lose my email settings (hopefully that gets fixed soon) I will not lose my contact images.