DO NOT click "Rebuild"
if you are running Mail 2.1.3 in Mac OS 10.4.11 + you run into troubles w/yr Mail.app email client DO NOT click "Rebuild" + think that anyThin helpful will happen, b/c i can tell you, it will _NOT_ be good. Mail.app just purged 2 months of my sent mail + it is rly unrecoverable b/c my last functional backUp was 2 months ago. the img above shows my current Sent mailbox minus about 2 other emails. i have yet to Import from the previous backUp from 2 months ago