Sorry if this is a little off topic - maybe it should be posted somewhere else? In any case, I thought syncing my Droid X to my Gmail contacts messed up, i.e. deleted hundreds of contacts. Turns out Gmail had a update/face lift of sorts and decided to put some contacts in "My contacts" and some in "other contacts" - I was quite upset when I thought I was missing tons of contacts - fortunately, it's not the case. See here:

"Missing" contacts? Check your other contact groups! - Gmail Help