Well, this time my desktop lost the datebook without any active interface with the Zire21 itself. This was discussed earlier this month under the subject line: "Zire 21 datebook lost on Hot Sync" I went into the file system, in my computer under "palmone" and even the .bak file was several days old, so it looks like the .bak doesn't get updated automatically, maybe only on a shutdown of the palm desktop. Well this time I had a datebook .dat file only a week old I could bring back, and did. In any case, it seems there is something amiss with the Palm Destop software, or with it running on a Gateway Notebook. I never had this problem when I had the Palm Desktop on my previous HP notebook, it was in use for about three years.