EDIT: checking my logs I got also error 1004 as you mention: Code: Jan 30 01:23:31 Nokia-N900-42-11 activesync[1363]: BasicSyncActionWrapper: execute failed with err=1004, failsCount=2
Jan 30 01:23:31 Nokia-N900-42-11 activesync[1363]: BasicSyncActionWrapper: execute failed with err=1004, failsCount=2
BTW, does anyone has an explanation why there are twice the Drafts and Sent Items folders?